对于地质灾害，事先做一番调查研究和分析论证，对减灾是大有裨益的。
For disaster reduction, it is of great benefit to investigate, research on, analyze and prove geologic disasters in advance.
对于地质灾害，事先做一番调查研究和分析论证，对减灾是大有裨益的。
For disaster reduction, it is of great benefit to investigate, research on, analyze and prove geologic disasters in advance.
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