two_obstructions_有道手机词典

1.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。
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2.The trick is that two of the three slits are blocked by obstructions that can only be seen by looking in a mirror that reflects a backward view of what's inside the box.
问题难在这三道叉中有两道是被堵着的，只能通过镜子看盒子里面的倒影才能看出来。
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3.For longer paths, detailed path surveys may be required to determine that there are no topographic or man-made obstructions blocking the line of sight between the two facilities.
对于长距离路径，则必须仔细勘查两个设施问的路径，确保在视距以内没有地形上或人为的障碍物。
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