Assessment on stability of partial rock-block mass is essential during tunnel's design and construction.
隧道围岩局部块体稳定性分析是隧道设计和施工过程中必不可少的环节。
In the most simple case that I can think of, I have here a block m which has a certain mass, m.
在最简单的示范中，我有一个大块，它的质量为。
A large block of ice broke away from the main mass.
一大块冰从主体分离出来。
A large block of ice broke away from the main mass.
一大块冰从主体分离出来。
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