下一行开始一个代码块，规定当每个客户端连接时要做的事情。

The next line starts a code block that dictates what happens when each client connects.

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对每个服务器，必须有一个客户端——客户端容易被恶意服务器进行攻击。

For every server, there must be a client — and that client can be susceptible to attacks by a malicious server.

youdao

每个组织都需要一个成熟的电子邮件客户端，它提供了丰富的功能、安全且安装简单。

Every organization requires a full-fledged mail client with rich features, security, and easy setup.

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