It is pointed out that the external causes of cracks originating are effected by static pressure, thermal stress and structural shrinking stress and etc.
指出裂纹产生的外因是钢水的静压力、热应力、组织收缩应力和其它外力的作用。
It naturally gets smaller as we age, but a review in Current Opinion in Psychiatry found that stress can cause structural damage and accelerate the shrinking process.
随着年龄增加，它会不断缩小。不过，《精神医学最新观点》发现，压力会造成海马体结构性损伤，加速缩小进程。
Stress caused by a slowing economy, shrinking retirement accounts and rising unemployment rates is driving some American smokers to increase the habit or delay quitting, according to a new survey.
一项最新调查显示，经济放缓、退休金减少和失业率不断上升让美国人不堪重压，一些烟民则因此增大了吸烟量或推迟了戒烟计划。
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