cylindrical shell with circumferential through-crack 周向壁穿裂纹圆柱壳
The next few sections describe some of the most useful features tcsh provides through shell built-ins.
下面几节讨论 tcsh 通过 shell 内置变量提供的一些最有用的特性。
First through a low velocity core, and then through a high velocity shell, where their speed is increased before they are transmitted into the surrounding seawater.
它们首先通过一个低速的核心，然后通过一个高速的外壳，在它们被输送进周围的海水之前，它们的速度提高了。
CPAN can work in two ways — either through an interactive shell or through a series of functions that can be used as part of a wider Perl script-based solution.
CPAN可以以两种方式工作：通过交互shell或通过一系列函数，可以将这些函数用作范围较广泛的基于perl脚本的解决方案的一部分。
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