You can walk through and check every room of your house and see if you need to make any changes in the decorations or furniture placement.
你可以到房子里的每间房间里都去走走和检查一下,看看你是否需要在装饰或家俱的安置方面作些变动。
Every time you call a function that can return an error, you need to be careful to check that your request produced the result you expected (or handle the error if it didn't).
每次您调用一个可以返回错误值的函数时,就必须小心地检查请求所生成的结果正是您所希望的(如果不是,就需要对错误进行处理)。
Of course, you could run the PWD command every time you need to check the current working directory, but there's a better way.
当然,每当您想检查当前工作目录时,您都可以运行pwd命令,但还有更好的方法。
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