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1·Is it yours for keeps or does he want it back?

这东西是永远属于你了，还是要还给他？《牛津词典》

2·His genes are for keeps.

他的基因是用于传承的。

3·This gold medal is yours for keeps.

这个金牌永远属于你。

4·I'm in him for keeps.

我是吃定他了。

5·This time I am giving it to you for keeps.

这次我把它永远送给你了。

6·MEMBERSHIP of the euro is meant to be for keeps.

加入欧元成员的初衷是为了生存下去。

7·Ensure that whatever you gain now will be for keeps.

确保你现在所获得的一切永远不会失去。

8·If proved a generous host, he made friends for keeps.

如果大家认为他是一个慷慨的东道主，他就会交到朋友。

9·When it comes to market share, we're playing for keeps.

一涉及到市场份额，我们就来劲儿了。

10·If the book will be of any use to you, you can have it for keeps.

如果这本书对你有用处的话，你可以永远保留之。