caving的中文翻译是什么意思

The river was caving the banks.

河水在两岸冲了个洞.

You should wear hard hats when caving to protect the head from bumps and falling rocks.

在开采洞穴时,你必须要戴上安全帽,以防止头部撞到突起物,或者被掉落的岩石砸伤.

Increasing recovery rate coal is one of key problem in studying wallcoal caving.

提高顶煤回收率是综放开采研究的关键问题之一.

Finally , the paper considers that the fully mechanized coal caving mining is helpful control outburst hazard.

具突出危险性的厚煤层采用综采放顶煤开采法对消突是有积极作用的.

Caving means exploring the passages underneath the hills.

洞穴探险运动是指探察山中的通道而进行的活动.