你了解多少?
[color=#ff0000][color=#000000]1.[/color] to know/learn something by heart[/color] 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. [color=#ff0000]to know something like the back of one’s back[/color] 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。
3.[color=#ff0000] know something inside out[/color] 了解彻底
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。
4. [color=#ff0000]know next to nothing[/color] 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.
我对政治实在没什么兴趣，对此几乎一无所知。
5 .[color=#ff0000]not have the faintest idea[/color] 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。”
6. [color=#ff0000]haven’t got a clue[/color] 一点不知道
'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。”
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