You need a show_users function that gives you a list of all the users in the system.

这里需要一个show_users函数，该函数可以返回系统中所有用户的一个列表。

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Now that you have the show_users function, you can create a users.php file that runs it and displays a list of all the users in the system, each with a link that says follow next to the user name.

有了show_users函数之后，接下来可以创建一个users . php文件，该文件将运行这个函数，并显示系统中所有用户的一个列表，对于每个用户，在用户名的旁边都有一个follow链接。

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This paper studies the carbon sink function of the present and future agricultural system of China, and a list of carbon emission and fixation of which is proposed.

研究我国现实和未来农业系统碳汇功能，提出该系统碳排放和碳固定清单。

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