名词
中文翻译：亚微米粒子
同义词：
['sub-micron particle', 'sub-nanometer particle']
例句：
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1. Theparticles in the air are tiny enough to be invisible to the naked eye.
空气中的粒子足够小，肉眼无法看见。
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2.The scientist used a microscope to observe the submicroscopic particles.
科学家使用显微镜观察了这些亚微米粒子。
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3.The particles in the sample were so small that they could not be detected by the naked eye.
样品中的粒子太小，肉眼无法察觉。