名词
中文翻译：无质量粒子
同义词：
['neutral particle', 'massless particle', 'zero-mass particle']
例句：
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1. The massless particle theory is a fundamental theory in quantum mechanics.
无质量粒子理论是量子力学的一个基本理论。
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2.The massless particle has no mass and can move at the speed of light.
无质量粒子没有质量，可以以光速移动。
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3. The massless particle has been proposed as a possible explanation for the origin of the universe.
无质量粒子被提出作为宇宙起源的可能解释。