Also, each time the buddy list would signal its list of listeners, it would waste time notifying the chat Windows that had previously been closed.
2
天窗由两只压力扬汲机控制启动,它有内置的传感器,防止因障碍物而关闭,但是当强风来袭时,会自行关闭。
The skylight is raised by two hydraulic rams. It has in-built sensors that prevent it from closing on obstructions, but that activate closure during sudden gusts of winds.