名词
中文翻译：纵向聚焦
同义词：
['axial focusing', 'longitudinal beam focusing']
例句：
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1.The beam is focused through a lens to produce an image.
光束通过透镜聚焦产生图像。
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2.In this experiment, the longitudinal beam was used to measure the distance between two points.
在这个实验中，纵向光束被用来测量两点之间的距离。
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3.The physicist used a longitudinal beam to study the behavior of matter under extreme conditions.
物理学家使用纵向光束来研究物质在极端条件下的行为。