“First, at any time, a (small) fraction of the crust is close to the rupture instability.
“First, at any time, a (small) fraction of the crust is close to the rupture instability.
“首先，在任何时间，地壳的一个〔小〕部分临近破裂非稳定状态。
“First, at any time, a (small) fraction of the crust is close to the rupture instability.
“首先，在任何时间，地壳的一个〔小〕部分临近破裂非稳定状态。