know, learn, comprehend, understand

名詞 know:

1. the fact of being aware of information that is known to few people

動(dòng)詞 know:

1. be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
   同義詞：cognize, cognise
2. know how to do or perform something
3. be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
4. be familiar or acquainted with a person or an object
5. have firsthand knowledge of states, situations, emotions, or sensations
   同義詞：experience, live
6. accept (someone) to be what is claimed or accept his power and authority
   同義詞：acknowledge, recognize, recognise
7. have fixed in the mind
8. have sexual intercourse with
   同義詞：roll in the hay, love, make out, make love, sleep with, get laid, have sex, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk
9. know the nature or character of
10. be able to distinguish, recognize as being different
11. perceive as familiar

1. I know Paris better than Rome.
   我對(duì)巴黎比對(duì)羅馬熟悉。
2. He's sometimes been known to sit there all day.
   有時(shí)能見(jiàn)到他整天坐在那里。
3. I know London as the place where I spent my childhood.
   我熟悉倫敦，那是我度過(guò)童年的地方。
4. She knows a bargain when she sees one.
   她有辨別便宜貨的能力。
5. I've known Tom for years.
   我認(rèn)識(shí)湯姆很多年了。
6. He has known both grief and happiness.
   憂患和快樂(lè)他都經(jīng)歷過(guò)。
7. I know what happened.
   我知道發(fā)生了什么事。

know

v.（動(dòng)詞）
knew[nô, nyô] known[nôn] know.ing,knows
v.tr.（及物動(dòng)詞）
To perceive directly; grasp in the mind with clarity or certainty.
通曉，領(lǐng)悟：直接地理解；在心中清晰或明確地掌握
To regard as true beyond doubt:
確信，認(rèn)為：認(rèn)為是確實(shí)的，無(wú)可懷疑的：
例句：
I know she won`t fail.
我確信她不會(huì)輸

To have a practical understanding of, as through experience; be skilled in:
了解，熟練，擅長(zhǎng)：通過(guò)經(jīng)歷，對(duì)…有實(shí)踐上的了解；熟練于某事：
例句：
knows how to cook.
擅長(zhǎng)烹飪

To have fixed in the mind:
牢記：印在腦子里：
例句：
knows her Latin verbs.
記住她的拉丁動(dòng)詞

To have experience of:
經(jīng)歷過(guò)：
例句：
.a black stubble that had known no razor.(William Faulkner)
.很久沒(méi)刮過(guò)的黑胡茬.(威廉·福克納)

To perceive as familiar; recognize:
察覺(jué)，認(rèn)得：看上去覺(jué)得熟悉；認(rèn)識(shí)：
例句：
I know that face.
我認(rèn)識(shí)那個(gè)人

To be acquainted with:
與…熟悉：
例句：
He doesn`t know his neighbors.
他和鄰居不熟

To be able to distinguish; recognize as distinct:
辨別：能夠區(qū)分；找出不同點(diǎn)：
例句：
knows right from wrong.
辨別對(duì)錯(cuò)

To discern the character or nature of:
看出，辨識(shí)：看到…的特征或性質(zhì)：
例句：
knew him for a liar.
看出他是個(gè)騙子

Archaic To have sexual intercourse with.
【古語(yǔ)】 與…發(fā)生性關(guān)系
v.intr.（不及物動(dòng)詞）
To possess knowledge, understanding, or information.
擁有知識(shí)、理解力或信息
To be cognizant or aware.
知道，明白

<習(xí)慣用語(yǔ)>in the know【非正式用語(yǔ)】
Possessing special or secret information.
知道的，消息靈通的：掌握特別或秘密的信息的
you know【非正式用語(yǔ)】
Used parenthetically in conversation, as to fill pauses or educe the listener`s agreement or sympathy:
你知道，你要知道：在談話中作插入語(yǔ)，用于填補(bǔ)停頓或獲取聽(tīng)者的贊同或認(rèn)同：
例句：
Please try to be, you know, a little quieter. How were we supposed to make camp in a storm like that, you knowô
請(qǐng)你盡量安靜一點(diǎn)。你知道，我們?cè)谀菢拥谋╋L(fēng)雨中怎么扎營(yíng)呢ô

來(lái)源：
Middle English knowen
中古英語(yǔ) knowen
from Old English cn3wan * see gnô-
源自 古英語(yǔ) cn3wan *參見(jiàn) gnô-

【引伸】
know.able
adj.（形容詞）
know.er
n.（名詞）