The lower limit (warning) is called the soft limit and the higher limit (which prevents creation of files over that level) is called the hard limit.

下限(发出警告)称为软限制，而上限(禁止创建超过该限制的文件)称为硬限制。

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According to the range of lower explosive concentration limit, methods for how to set up warning region were research.

通过分析氨气扩散后爆炸浓度下限范围，探讨了如何设置警戒区的方法。

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