| 释义 |
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Shell to harden. Before that happens, this outer layer of tissue is too soft and flexible to transmit muscle contractions as it did, and will do again when the. 在壳变硬之前，外面的那层“壳”太软太韧了，以致于无法进行正常的肌肉收缩。 - 2
Seizures can vary from the briefest lapses of attention or muscle jerks, to severe and prolonged convulsions (i.e. violent and involuntary contractions, or a series of contractions, of the muscles). 癫痫的发作可能存有不同情况，从简短的意识丧失或肌肉反射到严重并且长期性抽搐(即肌肉的强烈和不自主性收缩或者一系列收缩)不等。 - 3
Breaking down food, absorbing nutrients, and expelling of waste requires chemical processing, mechanical mixing and rhythmic muscle contractions that move everything on down the line. 分解食物、吸收营养，排出废物，则需化学反应，机械搅拌，肌肉韵动三方协作。
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