Many important physiological processes occur during deep sleep.
很多重要的生理活动都发生在深睡眠阶段。
Thus, some deep processes of rifts and its seed is nothing to be known.
因此，裂谷系的深部过程及其原由还是知之甚少。
The deep drawing, trimming and flanging is the most basic three processes.
而拉深、切边和翻边是最基本的三道工序。
The deep drawing, trimming and flanging is the most basic three processes.
而拉深、切边和翻边是最基本的三道工序。
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