New words：

benefit [ˈbenəfɪt]
n.利益；益处；优势；成效；福利费
v.对（某人）有用；使受益；得益于；得利于

Sample Sentences：

It will be to your benefit to arrive early.
You must weigh the benefits against the cost.
He couldn't see the benefit of arguing any longer.
We should spend the money on something that will benefit everyone.

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