However, the caving maybe happen because of too large transmogrification and rheologic fracture to high crustal stres.

统断裂准则，最终形成了诱导条件下节理岩体持续大规模自然崩落。

Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.

根换程与约束程显含时间的等价性，提出了定常约束与定常系统的等同表述。

This criterion is reasonable because it is not expressed in terms of the precessional velocity, but the angular velocity of the permanent rotation.

用永久转动角速度的大小而不是进动角速度的大小作为别准则,较为合理。