mass spread meaning in English

质量分布

On a short view , the special physiognomy such as mass spreading meteorite craters in shenzhen and other place is like a grand geological museum bestowed by god
从现在来看，深圳等地大规模的分布陨石坑等特殊的地质地貌构造宛如上天送给了我们一个宏大的地质博物馆。
First of all , this essay summarizes the relationship between library and mass medium . through the summary , the conclusion comes that library is an important public spreading channel and it can increase the effect of simple mass spread
本文先简要分析了图书馆与大众媒介之间的关系,通过分析,得出了图书馆是重要的大众传播通道,并能使简单大众传播效果增强的结论。