韦德为此花了10000美元。它确实很有用,但也很贵。
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.
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.
一本在线字典可以很有用,但也容易产生依赖性,要适度使用。
An online dictionary can be useful, but it easily becomes a crutch. Use it sparingly.
火可能很有用,但也可能很有害。当你生火时一定要小心。
Fire can be very useful, but it can also be very harmful. Be careful when you start a fire.
火可能很有用,但也可能很有害。
火可能很有用,但也可能很有害。
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