当创建另外的用户时不要使用它；否则，只有最新的用户才能够登录。
Don't use it when you create additional users; otherwise, only the most recent user will be able to log in.
每行显示一个打开的文件，除非另外指定，否则将显示所有进程打开的所有文件。
One open file is displayed per line and, unless you specify otherwise, all open files from all processes are displayed.
沼气工厂的另外一个好处是可以消除大量肥料，否则这些肥料就会污染空或者水源。
Another plus is that biogas plants can devour vast quantities of manure that would otherwise pollute the air and could affect water supplies.
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