通常有一个防水织物的外部帐篷和一个或多个带有内置防潮布的较轻的内部帐篷。

There is usually an outer tent of water-proofed fabric and a lighter inner tent or tents with a built-in groundsheet.

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通常有一个防水布料构成的外部帐篷和一个较轻的或带有内置防潮布的内部帐篷。

There is usually an outer tent of water-proofed fabric and a lighter inner tent or tent with a built-in groundsheet.

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bash shell包含两类命令：内部的内置命令和外部程序(或外部筛选器和命令，它们通常是自含的二进制程序文件)。

The bash shell contains two types of commands: builtins, which are internal, and external programs (or external filters and commands), which are typically self-contained binary program files.

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