名词
中文翻译：主光束
同义词：
['main beam', 'primary beam例句：1. The main beam of the lighthouse is visible from a distance.（灯塔的主光束可以从远处看到。）']
例句：
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1. The main beam of the lighthouse is visible from a distance.
灯塔的主光束可以从远处看到。
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2. The main beam of the laser pointer is directed towards the target.
激光笔的主要光束指向目标。
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3.The main beam of the spotlight was shining brightly.
聚光灯的主要光束非常明亮。