!他们之间的关系（记着这个就能分辨异同囖!）!--》If you cannot comprehend something, you cannot understand it.
comprehend
及物动词 vt.
1.理解, 领会
I did not comprehend his meaning.
我不理解他的意思.
2.包括
understand
to know or realize the meaning of words, a language, what somebody says, etc. 懂；理解；领会
Can you understand French? 你懂法语吗? VN
Do you understand the instructions? 你懂得这些指令的意思吗?
She didn't understand the form she was signing. 她弄不懂她正在签署的表格.
I'm not sure that I understand. Go over it again. 我不敢说我搞懂了.请再来一遍吧. V
I don't want you doing that again. Do you understand? 我不许你再这样做.你听明白了吗? figurative
I don't understand what he's saying. 我不明白他在说些什么. V wh-
to know or realize how or why something happens, how it works or why it is important 了解；认识到；明了
Doctors still don't understand much about the disease. 医生对这种疾病还了解不多. VN
No one is answering the phone—I can't understand it. 没人接电话,我不知道是怎么回事.
I could never understand why she was fired. 我怎么也不明白她为何被解雇. V wh-
I just can't understand him taking the money. 我真想不通他为什么会偷钱. VN -ing
I just can't understand his taking the money. 我真不明白他为什么会偷钱. formal
to know somebody's character, how they feel and why they behave in the way they do 了解；谅解；体谅
Nobody understands me. 没有人了解我. VN
He doesn't understand women at all. 他根本就不了解女性.
They understand what I have been through. 他们对我的遭遇很同情. V wh-
I quite understand that you need some time alone. 我很理解你需要独自静一会. V that
I quite understand you needing some time alone. 我很理解你需要独自静一会. VN -ing
If you want to leave early, I'm sure he'll understand. 如果你想早些离开,我相信他会体谅的. V
to think or believe that something is true because you have been told that it is 得知；据信；认为 formal
I understand (that) you wish to see the manager. 我听说您想见经理. V (that)
Am I to understand that you refuse? 你是告诉我你拒绝了?
The Prime Minister is understood to have been extremely angry about the report. 据说首相对这份报告大为恼火. VN to inf.
It is understood that the band are working on their next album. 据说这个乐队正在录制他们的下一张专辑. VN that
to agree something with somebody without it needing to be said 默认；默许；不言而喻 VN (that) usually passive
I thought it was understood that my expenses would be paid. 我原以为对方已同意支付我的费用.
to realize that a word in a phrase or sentence is not expressed and to supply it in your mind 领会；清楚；推断出 VN usually passive
In the sentence ‘I can't drive’, the object ‘a car’ is understood. 在 I cant drive 一句中,可推测出宾语 a car 被省略了.
Idiom: make yourself understood
找得那么辛苦加点分呗