韦德为此花了10000美元。它确实很有用，但也很贵。

It cost Wayde $10,000. It was useful but expensive.

youdao

由于这里省略了一些比较微小但也许很有用的变化，在必要的时候您可以自行查阅 perldoc 帮助文档。

You should consult them yourself, since this summary omits many minor but possibly significant changes.

youdao

这对于计算河流很有用，但也可以用于计算分水岭和其它特征。

This will be useful for rivers but may also be useful for calculating watersheds and other features.

youdao