专四词汇语法：“了如指掌”v.s“一无所知”

会计考友

1. to know/learn something by heart 记住；背诵
I can recite this poem without looking at it. I know it by heart.
我不用看就能把这首诗背出来。我已经把它背下来了。

2. to know something like the back of one’s back 了如指掌
- i  [& u- @. I3 X3 N  S' }He's lived in this city all his life. He knows it like the back of his hand.
( x3 _% ]# ]+ R他在这座城市住了一辈子，对这里可以说是了如指掌。

3. know something inside out 了解彻底
% e6 f& y- ?/ X+ q  {She spent twenty years studying the history of London. She knows it inside out.
她学了20年的伦敦历史。对此，她已经了解的十分彻底了。
: D5 W1 e5 u5 B* A! q8 W
4. know next to nothing 几乎不了解；几乎一无所知
I'm really not interested in politics. I know next to nothing about it.
' a+ m4 V: u) }' b: j' V6 ?* R9 [! K我对政治实在没什么兴趣，对此几乎一无所知。

4 C$ [2 a5 Z4 a# ^+ @5 .not have the faintest idea 一点都不知道
'Which is the longest river in the world?' 'I haven't the faintest idea.'
“世界上最长的河流是哪条河？”“我没什么概念。”

4 d/ U1 ?" W* O; S/ D6. haven’t got a clue 一点不知道
" x( N, U1 _! s& f'Can you tell me where Portsmouth Road is?' 'Sorry, I haven't got a clue.
“你知道朴次茅斯路怎么走吗？”“抱歉，我不知道。”