During periods when commodity prices were high, the rate of westward migration increased spectacularly.
在商品价格较高的时期，西迁的速度大幅增长。
The QA environment can withstand generally longer periods of down time which makes it an appropriate environment to test your migration plan.
QA环境通常容许更长时间的停机，这使它成为测试您的迁移计划的适当环境。
It is pointed out that, the number, scale and migration direction of fans were controlled by palaeogeomorphology, periods and strength of fault movement, and the development of slope-bend belt.
古地貌形态、断裂活动期次、强度及坡折带的发育控制了扇体的数量、规模与迁移方向。
The fractures are comparatively developed in Haian depression. They formed and were active in varied periods, controlling the trap of structures, the lateral and longitudinal migration of oil-gas.
海安凹陷断裂较发育，断裂形成、活动的时期不同，对构造圈闭、油气侧向及纵向上运移起控制作用。
During the active periods of structures, tectonic collapse resulted in the rapid longitudinal migration of hydrocarbon in wide area, which was characterized by paroxysmal and eventful.
构造活动期间， 构造塌陷作用能导致油气大面积、快速的纵向运移，并且这种运移具有很大的突发性和事件性；
During the active periods of structures, tectonic collapse resulted in the rapid longitudinal migration of hydrocarbon in wide area, which was characterized by paroxysmal and eventful.
构造活动期间， 构造塌陷作用能导致油气大面积、快速的纵向运移，并且这种运移具有很大的突发性和事件性；
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