Ambient air particles is one of the most important indicators of environmental pollution. Particulate matter ( PM) is solid or liquid granular material dispersed in the air.

  • 环境空气颗粒是环境污染的最重要指标,空气颗粒物(particulate matter,PM)是分散在空气中的固态或液态颗粒状物质。

  • 互联网摘选 2025-03-01 14:22:19

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