Ping takes its name from the technique of measuring distance with sonar.  In IRC, it is used to measure the time it takes to send a message to someone, and receive a response.  Specify a channel to ping everyone in that channel.  Some IRC clients will display ping requests to the user.  ChatZilla does not.
Ping 的名字来源于声纳测量距离的技术。在 IRC 中，它用于衡量向某人发送消息和接收响应所需的时间。指定一个频道会 ping 该频道中的每个人。一些 IRC 客户端会向用户显示 ping 请求。 ChatZilla 没有。