diff --git a/data/口语-第4课.tsv b/data/口语-第4课.tsv
new file mode 100644
index 0000000..b823afb
--- /dev/null
+++ b/data/口语-第4课.tsv
@@ -0,0 +1,90 @@
+1. web page	wǎng yè	网页	網頁
+"1. to import
+ 2. to input"	shū rù	输入	輸入
+"1. to research
+ 2. to check
+ 3. to investigate
+ 4. to examine
+ 5. to refer to
+ 6. to look up (e.g. a word in a dictionary)"	chá	查	查
+"1. bookshelf
+ 2. CL:個|个[ge4]"	shū jià	书架	書架
+"1. a brush
+ 2. to paint; to daub
+ 3. to brush; to scrub
+ 4. (fig.) to remove; to eliminate (from a contest); to fire (from a job)
+ 5. (onom.) swish; rustle
+ 6. to swipe (a card)
+ 7. to scroll on (a phone)
+ 8. (gaming) to grind; to farm (for experience points, equipment, levels etc)"	shuā	刷	刷
+"1. to sweep (with a brush or broom)
+ 2. to sweep away; to wipe out; to get rid of
+ 3. to sweep (one's eyes etc) over; to scan"	sǎo	扫	掃
+"1. to pat
+ 2. to clap
+ 3. to slap
+ 4. to swat
+ 5. to take (a photo)
+ 6. to shoot (a film)
+ 7. racket (sports)
+ 8. beat (music)"	pāi	拍	拍
+1. oh (interjection indicating that one has just learned sth)	ò	哦	哦
+"1. to agree
+ 2. to conclude
+ 3. to draw up
+ 4. to subscribe to (a newspaper etc)
+ 5. to order"	dìng	订	訂
+"1. to touch briefly; to tap
+ 2. to mark with a dot; to check off (on a list)
+ 3. to order (food etc); to select
+ 4. to mention; to bring up (a topic or person)
+ 5. to hint at; to imply
+ 6. to administer (eye medicine etc) in drops
+ 7. to light (a fire, a lamp etc); to ignite
+ 8. to nod (one's head) in agreement; to beckon by moving (one's hand) up and down
+ 9. point; dot; spot; speck
+ 10. dot stroke in Chinese characters
+ 11. (math.) decimal point
+ 12. point in time or space
+ 13. (after a number) o'clock
+ 14. a small amount; a bit; (after a verb or adjective) a bit more
+ 15. classifier for small amounts"	diǎn	点	點
+"1. course of lectures; lecture series
+ 2. chair (academic position)"	jiǎng zuò	讲座	講座
+"1. appointment
+ 2. engagement
+ 3. date
+ 4. CL:次[ci4],個|个[ge4]
+ 5. to arrange to meet"	yuē huì	约会	約會
+1. to focus one's attention; to concentrate on (doing sth)	zhuān xīn	专心	專心
+"1. result
+ 2. effect
+ 3. efficacy
+ 4. (theater) sound or visual effects"	xiào guǒ	效果	效果
+"1. material
+ 2. resources
+ 3. data
+ 4. information
+ 5. profile (Internet)
+ 6. CL:份[fen4],個|个[ge4]"	zī liào	资料	資料
+"1. to fill
+ 2. full
+ 3. filled
+ 4. packed
+ 5. fully
+ 6. completely
+ 7. quite
+ 8. to reach the limit
+ 9. to satisfy
+ 10. satisfied
+ 11. contented"	mǎn	满	滿
+"1. at any time; at all times
+ 2. at the right time; whenever necessary"	suí shí	随时	隨時
+"1. to download
+ 2. also pr. [xia4zai4]"	xià zǎi	下载	下載
+"1. crucial point
+ 2. crux
+ 3. CL:個|个[ge4]
+ 4. key
+ 5. crucial
+ 6. pivotal"	guān jiàn	关键	關鍵
diff --git a/data/口语-第4课.txt b/data/口语-第4课.txt
new file mode 100644
index 0000000..2980253
--- /dev/null
+++ b/data/口语-第4课.txt
@@ -0,0 +1,20 @@
+网页
+输入
+查
+书架
+刷
+扫
+拍
+哦
+订
+点
+讲座
+约会
+马可波罗游记
+专心
+效果
+资料
+满
+随时
+下载
+关键
\ No newline at end of file
diff --git a/data/阅渎第一-六课.tsv b/data/阅渎第一-六课.tsv
new file mode 100644
index 0000000..30a1a4e
--- /dev/null
+++ b/data/阅渎第一-六课.tsv
@@ -0,0 +1,397 @@
+"1. to advertise
+ 2. a commercial
+ 3. advertisement
+ 4. CL:項|项[xiang4]"	guǎng gào	广告	廣告
+"1. different
+ 2. distinct
+ 3. not the same
+ 4. not alike"	bù tóng	不同	不同
+"1. quiet
+ 2. peaceful
+ 3. calm"	ān jìng	安静	安靜
+1. pretty; beautiful	piào liang	漂亮	漂亮
+"1. the East; the Orient
+ 2. two-character surname Dongfang"	Dōng fāng	东方	東方
+"1. oneself
+ 2. one's own"	zì jǐ	自己	自己
+"1. everyone
+ 2. influential family
+ 3. great expert"	dà jiā	大家	大家
+1. video	shì pín	视频	視頻
+"1. photograph
+ 2. picture
+ 3. CL:張|张[zhang1],套[tao4],幅[fu2]"	zhào piàn	照片	照片
+"1. question
+ 2. problem
+ 3. issue
+ 4. topic
+ 5. CL:個|个[ge4]"	wèn tí	问题	問題
+"1. affair; matter; thing; business
+ 2. CL:件[jian4],樁|桩[zhuang1]"	shì qing	事情	事情
+"1. afterwards; later
+ 2. newly arrived"	hòu lái	后来	後來
+"1. to send out
+ 2. to show (one's feeling)
+ 3. to issue
+ 4. to develop
+ 5. to make a bundle of money
+ 6. classifier for gunshots (rounds)"	fā	发	發
+"1. easy; straightforward
+ 2. likely; liable to; apt to"	róng yì	容易	容易
+"1. interesting
+ 2. meaningful
+ 3. enjoyable
+ 4. fun"	yǒu yì si	有意思	有意思
+"1. if
+ 2. in case
+ 3. in the event that"	rú guǒ	如果	如果
+"1. only
+ 2. merely
+ 3. no more than
+ 4. but
+ 5. however
+ 6. anyway (to get back to a previous topic)
+ 7. cannot be more (after adjectival)"	bù guò	不过	不過
+"1. chopsticks
+ 2. CL:對|对[dui4],根[gen1],把[ba3],雙|双[shuang1]"	kuài zi	筷子	筷子
+"1. Internet celebrity; influencer
+ 2. (attributive) popular on the Internet"	wǎng hóng	网红	網紅
+"1. to travel
+ 2. journey; trip
+ 3. CL:趟[tang4],次[ci4]"	lu:3 xíng	旅行	旅行
+1. husband	zhàng fu	丈夫	丈夫
+"1. before
+ 2. formerly
+ 3. previous
+ 4. ago"	yǐ qián	以前	以前
+"1. chest
+ 2. heart; mind"	xīn li	心里	心裡
+"1. recently
+ 2. soon
+ 3. nearest"	zuì jìn	最近	最近
+"1. (once) again
+ 2. also
+ 3. both... and...
+ 4. and yet
+ 5. (used for emphasis) anyway"	yòu	又	又
+"1. to move (sb)
+ 2. to touch (sb emotionally)
+ 3. moving"	gǎn dòng	感动	感動
+1. to cry; to weep	kū	哭	哭
+1. narrative; story; tale	gù shi	故事	故事
+1. to be concerned about; to care about	guān xīn	关心	關心
+"1. to live
+ 2. life
+ 3. livelihood"	shēng huó	生活	生活
+"1. to notice; to become aware of
+ 2. to discover; to find; to detect
+ 3. a discovery"	fā xiàn	发现	發現
+"1. to misunderstand
+ 2. to mistake
+ 3. misunderstanding
+ 4. CL:個|个[ge4]"	wù huì	误会	誤會
+1. to discuss; to talk over	tǎo lùn	讨论	討論
+"1. to understand
+ 2. to realize
+ 3. to find out"	liǎo jiě	了解	了解
+"1. someone
+ 2. people
+ 3. anyone
+ 4. there is someone there
+ 5. occupied (as in restroom)"	yǒu rén	有人	有人
+1. only; merely; just	zhǐ	只	只
+1. to dance	tiào wǔ	跳舞	跳舞
+"1. traffic accident; car crash
+ 2. CL:起[qi3]"	chē huò	车祸	車禍
+"1. each
+ 2. every"	měi	每	每
+"1. common
+ 2. ordinary
+ 3. general
+ 4. average"	pǔ tōng	普通	普通
+"1. straight (in a straight line)
+ 2. continuously; always; all the way through"	yī zhí	一直	一直
+"1. hard
+ 2. firm
+ 3. strong
+ 4. just
+ 5. barely
+ 6. exactly"	gāng	刚	剛
+"1. band
+ 2. belt
+ 3. girdle
+ 4. ribbon
+ 5. tire
+ 6. area
+ 7. zone
+ 8. region
+ 9. CL:條|条[tiao2]
+ 10. to wear
+ 11. to carry
+ 12. to take along
+ 13. to bear (i.e. to have)
+ 14. to lead
+ 15. to bring
+ 16. to look after
+ 17. to raise"	dài	带	帶
+"1. to take care of
+ 2. to show consideration
+ 3. to attend to
+ 4. to look after"	zhào gu	照顾	照顧
+"1. to yield
+ 2. to permit
+ 3. to let sb do sth
+ 4. to have sb do sth
+ 5. to make sb (feel sad etc)
+ 6. by (indicates the agent in a passive clause, like 被[bei4])"	ràng	让	讓
+1. public square; plaza	guǎng chǎng	广场	廣場
+"1. to feel embarrassed
+ 2. to find it embarrassing
+ 3. to be sorry (for inconveniencing sb)"	bù hǎo yì si	不好意思	不好意思
+"1. to wish
+ 2. to want
+ 3. ready
+ 4. willing (to do sth)"	yuàn yì	愿意	願意
+"1. to live
+ 2. life
+ 3. livelihood"	shēng huó	生活	生活
+"1. to change into
+ 2. to turn into
+ 3. to become"	biàn chéng	变成	變成
+"1. appearance
+ 2. manner
+ 3. pattern
+ 4. model"	yàng zi	样子	樣子
+1. more and more	yuè lái yuè	越来越	越來越
+"1. right; correct
+ 2. towards; at; for
+ 3. concerning; regarding
+ 4. to treat (sb a certain way)
+ 5. to face
+ 6. (bound form) opposite; facing; matching
+ 7. to match together; to adjust
+ 8. to fit; to suit
+ 9. to answer; to reply
+ 10. to add; to pour in (a fluid)
+ 11. to check; to compare
+ 12. classifier: couple; pair"	duì	对	對
+"1. to practice
+ 2. field work
+ 3. to intern
+ 4. internship"	shí xí	实习	實習
+"1. this kind of
+ 2. so
+ 3. this way
+ 4. like this
+ 5. such"	zhè yàng	这样	這樣
+1. to express; to convey	biǎo dá	表达	表達
+"1. to contain
+ 2. to hold
+ 3. (of a person or style etc) reserved
+ 4. restrained
+ 5. (of words, writings) full of hidden meaning
+ 6. implicit
+ 7. veiled (criticism)"	hán xù	含蓄	含蓄
+"1. to bend
+ 2. bent
+ 3. a bend; a turn (in a road etc)
+ 4. CL:道[dao4]"	wān	弯	彎
+1. romantic	làng màn	浪漫	浪漫
+"1. direct (opposite: indirect 間接|间接[jian4 jie1])
+ 2. immediate
+ 3. straightforward"	zhí jiē	直接	直接
+"1. why?
+ 2. for what reason?"	wèi shén me	为什么	為什麼
+"1. more
+ 2. even more
+ 3. further
+ 4. still
+ 5. still more"	gèng	更	更
+"1. reason
+ 2. argument
+ 3. sense
+ 4. principle
+ 5. basis
+ 6. justification
+ 7. CL:個|个[ge4]"	dào li	道理	道理
+"1. to resemble
+ 2. to be like
+ 3. to look as if
+ 4. such as
+ 5. appearance
+ 6. image
+ 7. portrait
+ 8. image under a mapping (math.)"	xiàng	像	像
+"1. long
+ 2. (bound form) length
+ 3. (bound form) strong point; forte
+ 4. (bound form) to be good at
+ 5. (literary) surplus; spare (Taiwan pr. [zhang4])"	cháng	长	長
+"1. idea
+ 2. opinion
+ 3. meaning
+ 4. wish
+ 5. desire
+ 6. interest
+ 7. fun
+ 8. token of appreciation, affection etc
+ 9. CL:個|个[ge4]
+ 10. to give as a small token
+ 11. to do sth as a gesture of goodwill etc"	yì si	意思	意思
+"1. loud voice
+ 2. in a loud voice
+ 3. loudly"	dà shēng	大声	大聲
+"1. habit
+ 2. custom
+ 3. usual practice
+ 4. to be used to
+ 5. CL:個|个[ge4]"	xí guàn	习惯	習慣
+1. brave; courageous	yǒng gǎn	勇敢	勇敢
+1. then; after that; afterwards	rán hòu	然后	然後
+"1. operation
+ 2. action
+ 3. CL:個|个[ge4]
+ 4. to move about
+ 5. mobile"	xíng dòng	行动	行動
+"1. how (wonderful etc)
+ 2. what (a great idea etc)
+ 3. however (difficult it may be etc)
+ 4. (in interrogative sentences) how (much etc)
+ 5. to what extent"	duō me	多么	多麼
+1. wife	qī zi	妻子	妻子
+"1. nature
+ 2. disposition
+ 3. temperament
+ 4. character
+ 5. CL:個|个[ge4]"	xìng gé	性格	性格
+1. mother-in-law and daughter-in-law	pó xí	婆媳	婆媳
+1. difficult problem	nán tí	难题	難題
+"1. not long (after)
+ 2. before too long
+ 3. soon
+ 4. soon after"	bù jiǔ	不久	不久
+"1. to come across
+ 2. to run into
+ 3. to meet
+ 4. to hit"	pèng dào	碰到	碰到
+"1. to take a walk
+ 2. to window-shop
+ 3. to stroll down the street"	guàng jiē	逛街	逛街
+1. cockroach	zhāng láng	蟑螂	蟑螂
+"1. to clean
+ 2. to sweep"	dǎ sǎo	打扫	打掃
+"1. original; former
+ 2. originally; formerly; at first
+ 3. so, actually, as it turns out"	yuán lái	原来	原來
+"1. to leave
+ 2. to part from
+ 3. to be away from
+ 4. (in giving distances) from
+ 5. without (sth)
+ 6. independent of
+ 7. one of the Eight Trigrams 八卦[ba1 gua4], symbolizing fire
+ 8. ☲"	lí	离	離
+1. minute	fēn zhōng	分钟	分鐘
+"1. ability; talent
+ 2. sb of a certain type
+ 3. a capable individual
+ 4. then and only then
+ 5. just now
+ 6. (before an expression of quantity) only"	cái	才	才
+"1. urgent
+ 2. pressing
+ 3. rapid
+ 4. hurried
+ 5. worried
+ 6. to make (sb) anxious"	jí	急	急
+"1. to feel happy
+ 2. to rejoice
+ 3. to have a great time
+ 4. to make fun of sb"	kāi xīn	开心	開心
+"1. way of handling sth; means; measure; (practical) solution to a problem
+ 2. CL:條|条[tiao2],個|个[ge4]"	bàn fǎ	办法	辦法
+"1. flower
+ 2. blossom
+ 3. CL:朵[duo3],支[zhi1],束[shu4],把[ba3],盆[pen2],簇[cu4]
+ 4. fancy pattern
+ 5. florid
+ 6. to spend (money, time)
+ 7. (coll.) lecherous
+ 8. lustful"	huā	花	花
+"1. disappointed
+ 2. to lose hope
+ 3. to despair"	shī wàng	失望	失望
+"1. surely
+ 2. certainly
+ 3. necessarily
+ 4. fixed
+ 5. a certain (extent etc)
+ 6. given
+ 7. particular
+ 8. must"	yī dìng	一定	一定
+"1. to go out
+ 2. to leave home
+ 3. to go on a journey
+ 4. away from home
+ 5. (of a woman) to get married"	chū mén	出门	出門
+"1. echo
+ 2. sound
+ 3. noise
+ 4. to make a sound
+ 5. to sound
+ 6. to ring
+ 7. loud
+ 8. classifier for noises"	xiǎng	响	響
+1. already	yǐ jīng	已经	已經
+1. what's to be done	zěn me bàn	怎么办	怎麼辦
+"1. price
+ 2. CL:個|个[ge4]"	jià gé	价格	價格
+1. parts of the country other than where one is	wài dì	外地	外地
+"1. to work a temporary or casual job
+ 2. (of students) to have a job outside of class time, or during vacation"	dǎ gōng	打工	打工
+1. Spring Festival (Chinese New Year)	Chūn jié	春节	春節
+1. to celebrate the Chinese New Year	guò nián	过年	過年
+1. kilometer	gōng lǐ	公里	公里
+"1. (loanword) motorbike; motorcycle
+ 2. CL:輛|辆[liang4],部[bu4]"	mó tuō chē	摩托车	摩托車
+"1. exhausting
+ 2. hard
+ 3. tough
+ 4. arduous
+ 5. to work hard
+ 6. to go to a lot of trouble
+ 7. hardship(s)"	xīn kǔ	辛苦	辛苦
+1. scenery; landscape	fēng jǐng	风景	風景
+"1. hotel
+ 2. CL:家[jia1]"	lu:3 guǎn	旅馆	旅館
+"1. luggage
+ 2. CL:件[jian4]"	xíng li	行李	行李
+"1. to hear (sth said)
+ 2. one hears (that)
+ 3. hearsay
+ 4. listening and speaking"	tīng shuō	听说	聽說
+1. it	tā	它	它
+"1. like that; in that way; to that extent
+ 2. (before a number) ... or so; about ...
+ 3. then; in that case"	nà me	那么	那麼
+"1. to be afraid
+ 2. to fear
+ 3. to dread
+ 4. to be unable to endure
+ 5. perhaps"	pà	怕	怕
+"1. trip
+ 2. journey
+ 3. tourism
+ 4. travel
+ 5. tour
+ 6. to travel"	lu:3 yóu	旅游	旅遊
+1. old variant of 出[chu1]	chū	岀	岀
+"1. bright; light
+ 2. to shine; to flash
+ 3. loud and clear
+ 4. to show (one's passport etc); to make public (one's views etc)"	liàng	亮	亮
+"1. safe; secure
+ 2. safety; security"	ān quán	安全	安全
+1. don't!; must not	bù yào	不要	不要
+"1. to send
+ 2. to give as a present"	sòng gěi	送给	送給
diff --git a/data/阅渎第一-六课.txt b/data/阅渎第一-六课.txt
new file mode 100644
index 0000000..7f54b80
--- /dev/null
+++ b/data/阅渎第一-六课.txt
@@ -0,0 +1,123 @@
+广告
+不同
+安静
+漂亮
+东方
+自己
+大家
+视频
+照片
+问题
+事情
+后来
+发
+容易
+有意思
+如果
+不过
+筷子
+网红
+旅行
+钴婚
+丈夫
+以前
+心里
+最近
+又
+感动
+哭
+故事
+关心
+生活
+发现
+误会
+讨论
+了解
+有人
+只
+组约
+跳舞
+夫事
+车祸
+每
+普通
+一直
+刚
+带
+照顾
+让
+广场
+不好意思
+愿意
+生活
+变成
+样子
+越来越
+对
+来说
+实习
+这样
+表达
+含蓄
+弯
+浪漫
+直接
+为什么
+更
+道理
+像
+长
+意思
+大声
+习惯
+勇敢
+然后
+行动
+多么
+妻子
+性格
+婆媳
+难题
+不久
+碰到
+逛街
+蟑螂
+打扫
+原来
+离
+分钟
+平旳
+才
+急
+开心
+办法
+花
+失望
+办难
+一定
+出门
+响
+已经
+怎么办
+价格
+外地
+打工
+春节
+过年
+公里
+摩托车
+辛苦
+风景
+旅馆
+行李
+听说
+它
+那么
+怕
+旅游
+岀
+亮
+乘下
+安全
+不要
+送给