Rescuers got a stark lesson after Utah's Crandall Canyon mine collapse in 2007, when nine people died. Only one mobile robot made it down a borehole and onto the mine's floor.
在2007年犹他州的CrandallCanyon矿井崩塌事故中，机器人营救员们就遇到了这样的尴尬：在这起有九人丧生的事故中，仅有一台移动机器人完成了地底钻洞和矿井登录的工作。
The two sides of the combatants are kept in the tunnel between the shuttle, hidden in the huge industrial equipment and the collapse of the ruins of an apartment building in the floor.
双方的战斗人员都在隧道间不停地穿梭，隐蔽于巨大的工业设备和倒塌的公寓建筑的废墟楼板中。
Now, imagine after all that studying you're sitting in the exam hall waiting for the invigilator to tell you to begin and you see a girl faint and collapse to the floor.
现在，想象一下，在苦学多年之后你坐在考场等待监考老师告诉你开始答卷的时候，你看到一个女孩晕倒、摔倒在地板上。
Embossed molding the whole floor is the in-situ surface, one will be off or fade, do not collapse and fracture (such as grass-roots level is not broken).
压花地坪是现浇整体成型，表面一会剥落或退色，不塌陷及断裂(如基层不断裂)。
Suddenly, the whole building started to shake. I was scared — my classroom was on the third floor, the building would collapse and we would die there.
突然，整个大楼开始摇晃，我非常害怕- - - - - -我们的教室在三楼，如果大楼垮塌，我们将必死无疑。
Suddenly, the whole building started to shake. I was scared — my classroom was on the third floor, the building would collapse and we would die there.
突然，整个大楼开始摇晃，我非常害怕- - - - - -我们的教室在三楼，如果大楼垮塌，我们将必死无疑。
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