除了使用固定的序列之外，还可以指定一个包含“一次性序列”的文件，这些序列在使用之后就会删除，不能再次使用。

As an alternative to having single fixed sequences, you can specify a file with "one-time sequences" that, after they are used, are erased and cannot be used again. To specify such sequences, use.

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到中国出差的商人经常使用一次性的手机和携带删除敏感数据的电脑。

China often tote disposable cellphones and loaner laptops stripped of sensitive data.

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