重力、水压力、地震力是危岩崩塌的主要荷载。
The main loads leading to collapse of dangerous rock are gravity, water pressure and earthquake force.
目前还未有人坐在上面刚巧遇上岩石崩塌的情况，这不是因为判断力好，纯粹是走运，因为风化侵蚀是当地十分正常的自然现象。
It is purely down to luck rather than judgment that no one has been sitting on these chunks of rock when the ground has given way. For erosion is a fact of life here.
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