名词
中文翻译：Unknown
同义词：
['low-frequency beam', 'low-intensity beam', 'low-energy beam']
例句：
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1. The laser is used to create a low-density beam of light.
激光用于产生一束低密度的光束。
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2. In the experiment, a low-density beam was directed towards the target.
在实验中，一束低密度的光束被指向目标。
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3. The researchers used a low-density beam to study the properties of matter.
研究人员使用一束低密度的光束来研究物质的性质。