safe mass的意思|示意

This very low base-rate means that any precursors of a quake would have to be incredibly reliable if decision-makers are to feel safe in using them to order mass evacuations.

这么低的基础概率意味着，如果要让决策者下定决心，进行大规模人口疏散的话，任何地震前兆都必须极其可靠。

For zero nukes would make no sense if this left the world safe for the sorts of mass conventional warfare that consumed the first half of the 20th century.

如果说零核武意味着是使世界对于充斥20世纪上半页那样的传统大规模战事更加安全，那么它是毫无意义的。

For some of these diseases, we have powerful and safe medicines for use in mass prevention campaigns.

就上述疾病中的某些而言，我们已具备强效和安全的药物，可用于开展大规模预防运动。