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.
9 W8 ]& _3 I+ P+ b0 Y! D1 C3 @4 [: x我不用看就能把这首诗背出来。我已经把它背下来了。
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2. to know something like the back of one’s back 了如指掌
He's lived in this city all his life. He knows it like the back of his hand.
他在这座城市住了一辈子，对这里可以说是了如指掌。

( F$ t7 e7 y5 T7 h3. know something inside out 了解彻底
6 D0 w7 n+ M" E4 P3 A1 @She spent twenty years studying the history of London. She knows it inside out.
- `4 f9 v) ~( p' ~7 M: B5 V她学了20年的伦敦历史。对此，她已经了解的十分彻底了。
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4. know next to nothing 几乎不了解；几乎一无所知
" |" N/ A, P8 AI'm really not interested in politics. I know next to nothing about it.
我对政治实在没什么兴趣，对此几乎一无所知。
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/ `* |9 i1 K( s1 R; N; n- [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。”

7 h  O) Q  A7 j; u$ T: k2 [7 D% k6. haven’t got a clue 一点不知道
'Can you tell me where Portsmouth Road is?' 'Sorry, I haven't got a clue.
1 Q* B$ \% t/ r& k& W“你知道朴次茅斯路怎么走吗？”“抱歉，我不知道。”