这个词是什么意思？
Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce MACROPHAGE ACTIVATION and PHAGOCYTOSIS leading to FOREIGN BODY REACTION and LUNG DISEASES.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D052638 · MeSH 2026。
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