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1·I'd be grateful if you would keep it a secret.

你如果能对此保密，我将不胜感激。《牛津词典》

2·If we try to keep it a secret, she's guaranteed to find out.

如果我们试图保密，她肯定会发现。《牛津词典》

3·They had advised us to keep it a secret, but we wanted it out in the open.

他们曾建议我们对其保密，但我们却想将它公之于众。《柯林斯英汉双解大词典》

4·I told her she didn't need to keep it a secret from me.

我告诉她不需要对我保密。

5·I wanted to keep it a secret until I had dug all the way through.

我想保密，直到我把它挖穿。

6·Before she could react, I gave her a big hug and told her she didn't need to keep it a secret from me.

她还没反应过来，我就给了她一个大大的拥抱，告诉她不必对我保密。

7·He has known the truth. Therefore, there is no chance to keep it a secret.

他已经知道真相了。因此，不可能保密了。

8·Make sure you keep it a secret!

注意你一定要保守秘密！

9·I like to keep it a secret.

我想要守住这个秘密。

10·So I must keep it a secret.

所以我必须保持他一个秘密。