大多数外壳都支持函数，这些函数本质上是微型脚本，您可以在其中放置命令和其他外壳脚本元素以执行特定的任务。
Most shells support functions, which are basically mini scripts into which you can place commands and other shell-scripted elements to perform a specific task.
许多其他的过程可能改变蛤蜊或蜗牛的外壳，增加其保存的可能性。
Many other processes may alter the shell of a clam or snail and enhance its chances for preservation.
届时，海水开始溶解贻贝的外壳和其他甲壳类动物，对食物链造成严重破坏。
The water will then start to dissolve the shells of mussels and other shellfish and cause major disruption to the food chain.
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