名词
中文翻译：激光
同义词：
['light beam', 'optic beam']
例句：
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1. The laser is the most powerful tool in the world.
激光是世界上最强大的工具。
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2. The laser printer can print high-quality documents quickly.
激光打印机可以快速打印高质量的文件。
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3. The laser beam has a very short wavelength and is used for cutting metal.
激光束波长非常短，用于切割金属。