BIO_free_all does just what it says: it frees the internal structure and releases all associated memory, including closing the associated socket.

BIO_free_all所做正如其所言：它释放内部结构体，并释放所有相关联的内存，其中包括关闭相关联的套接字。

youdao

A message sent on a datagram socket was larger than the internal message buffer or some other network limit, or the buffer used to receive a datagram into was smaller than the datagram itself.

一个在数据报套接字上发送的消息大于内部消息缓冲器或其他一些网络限制，或该用户用于接收数据报的缓冲器比数据报小。

youdao

CAUTION: all valves with fixed socket end connectors in the body must be installed in the open position to aid in evaporation of solvent vapors which can attack internal components.

注意：所有阀体带固定承插连接端口的阀门必须安装在开阔的地方，使得粘固剂蒸汽能够顺畅蒸发而不会损坏内部部件。

youdao

The Logitech, Bose and Geneva Sound units all have internal batteries, so you can run them for a few hours without the need for a wall socket.

WSJ: Bluetooth Speakers: The Untethered Sound System