The first value is the minimum number of bytes allocated for the socket's send buffer.
第一个值是为socket的发送缓冲区分配的最少字节数。
The completion of the send operation does not depend on the status of a matching receive, and merely indicates that the send buffer can be reused.
发送操作的完成不依赖于对应的接收函数的状态，并且仅意味着发送缓冲区可以被重用。
The completion of the send operation does not depend on the status of a matching receive, and merely indicates that the send buffer can be reused.
发送操作的完成不依赖于对应的接收函数的状态，并且仅意味着发送缓冲区可以被重用。
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