1. Endpoint or router systems periodically send a ping to a location in the IP network. 端点或者路由器系统定期地向ip网络上的一个地方发送“乒”信号。
2. Training is in progress. Refresh this page in your browser periodically to see when training is complete. 训练正在进行。定期使用浏览器刷新该页面可查看训练何时结束。
3. Our organization periodically organizes special meetings with our partner when this alliance started to acquire new knowledge. 当我们联盟开始获得新知识时,我们的组织会定期与夥伴组成特殊会议。