A thrombus may cause sudden closure 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。
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。
Objective To evaluate the clinical effects of the anterior chamber penetration using acupuncture needle on treating the sudden attack of the Angle closure glaucoma.
目的探讨毫针前房穿刺放液处理急性闭角型青光眼急性发作的疗效。
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