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1·I don't know if I can get it clean.

我不知道我能否把它清理干净。《柯林斯英汉双解大词典》

2·But how long can you stay in the house?—I don't know. It depends.

“但你能在这屋里待多久？” — “不知道，这要看情况而定。”《柯林斯英汉双解大词典》

3·Don't play silly games with me; I know you did it.

别跟我兜圈子，我知道是你干的。《牛津词典》

4·I know you don't like her but try not to make it so obvious.

我明白你不喜欢她，但是尽量别表露得那么明显。《牛津词典》

5·You know what I mean—I'm sure I don't need to spell it out.

你明白我的意思—肯定不需要我解释了。《牛津词典》

6·I don't know what it was that did the trick, but I am definitely feeling much better.

我不知道是什么起的作用，但是我确实觉得好多了。《牛津词典》

7·Miss Allan beamed at him. You are clever to guess. I'm sure I don't know how you did it.—Deduction, James said.

阿伦小姐对他笑道：“你很会猜， 我确实不知道你怎么办到的。”——杰姆斯说：“推论。”《柯林斯英汉双解大词典》

8·I don't know exactly how we'll manage it , but we will, somehow.

我说不准我们如何去完成这件事，但不管怎样我们一定会完成的。《牛津词典》

9·Let me explain, sir.—Don't tell me about it. I don't want to know.

“让我来解释，先生。”—“别跟我说那事。我不想知道。”《柯林斯英汉双解大词典》

10·I don't know much about it, so I don't feel qualified to comment.

关于此事我所知不多，所以觉得没资格评论。《牛津词典》