Although not required, you have the option to modify those port Numbers to whatever you want.

虽然不是必须的，你仍然可以将这些端口号修改为你自己想要的。

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The file also helps humans relate port numbers to service names.

该文件还帮助人们将端口号关联到服务名称。

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Open this file and observe the default values for port numbers and other parameters.

打开此文件并观察端口号和其他参数的缺省值。

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The port has dug two deep water berths - numbers 8 and 9 - to accommodate them, as well as bought seven of the world's largest container cranes.

BBC: Felixstowe opens new berths for giant container ships