A thrombus may cause suddenclosure of the vessel with complete obstruction of the blood flow.
血栓会引起血管突然阻塞，造成血流完全中断。
2
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.
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。
3
Objective To evaluate the clinical effects of the anterior chamber penetration using acupuncture needle on treating the sudden attack of the Angle closure glaucoma.