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词汇
parallel beam
释义
parallel beam
短语¹³¹⁶²⁰⁺
³
基本
例句
平行光束,平行束
The parabolic reflector of a searchlight gives aparallel beam.
探照灯的抛物面反射镜发出平行光束。
Under astigmatism even narrow parallel light beams will not combine into one point.
有象散存在时甚至很窄的平行光束都不能会聚在一点。
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更新时间：2026/9/27 13:20:25