我的不标准英语怎么写

standard的`例句：

Who sets the standard for water quality?

水质标准由谁来制订？

The general standard of racing was abysmal.

比赛的总体水平糟透了。

A standard letter was sent to all candidates.

给所有求职者均寄去了一封标准函。

Her latest book isn't up to her usual standard.

她的`新作没有达到她平常的水准。

By day he worked downtown for American Standard.

白天，他在市中心为美国标准公司工作。