A beam of high radiant power will have high divergence.
高辐射功率的光束会有高的发散度.
Like the searchlight beam, the radio beam cannot be made very sharp; it tends to spread.
无线电射束也象探照灯的光束一样, 是不能高度集中的; 它总要散开.
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A flashlight beam probed the underbrush only yards away from their hiding place.
一束手电筒的光束在离他们的藏身之地只有几码远的灌木丛里搜寻着。
《柯林斯高阶英汉双解学习词典》
We first take up the subject of optic ray propagation through a variety of optical media.
首先研究光束通过各种光学介质的传播问题.
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For a wiggly-line trace , the beam is focused on the scope face at a point.
对于波形道, 光束在荧光屏面的一点上聚焦.
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These ensure optimum visibility thanks to a light beam that follows the course of the bend.
这些确保最佳能见度由于光束后面的弯曲过程.
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Researchers realised that a tunable laser beam might be useful in surgery.
研究人员意识到,可调谐激光束也许可以用在外科手术中。
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