I've been practising my serve for weeks.

我练发球有好几周了。

《牛津词典》

We need to continue to value broad preparation in thinking skills that will serve for a lifetime.

我们需要继续重视并充分锻炼令我们终身受用的思维技能。

youdao

The book will serve for a pillow.

这本书可当个枕头。

youdao

It was impossible for him to pay the government three hundred dollars or pay someone else to serve for him in the army.

VOA: special.2009.10.29

And I think there was a time when that sense of dominion was used as justification for using those resources only to serve human needs.

我想，有一段时间里，这种统治感,被人们当做使用资源的借口,仅仅为了满足人类的需求。

普林斯顿公开课 - 人性课程节选

Kinases can, in many cases, serve as a mechanism for switching a protein on or switching a protein off.

激酶能够,在很多情况下,能够激活一种蛋白或者关闭一种蛋白

耶鲁公开课 - 生物医学工程探索课程节选

Falla admitted the nerves had got to him as he prepared to serve for the match.

BBC: Wimbledon 2010: Roger Federer survives massive scare

An American-appointed security adviser, due to serve for five years, will oversee Iraq's security.

ECONOMIST: Iraq

Vote Obama by buying the chocolate ice cream cone, or choose the vanilla soft-serve for Romney.

FORBES: How Your Business Can Profit from the Presidential Election -- No Matter Who Wins