A piece of rock have fall and block up the path.
一块岩石掉了下来，堵住了路。
I'm shocked to see the pocket rocket made of a block of rock.
看到一块岩石做的小巧火箭，我感到震惊。
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。
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。
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