颗粒物由若干部分组成，其中包括有机化学品、金属、土壤和灰尘。

Particulate matter is made up of a number of parts, including acids, organic chemicals, metals, and soil or dust.

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颗粒物由若干部分组成，其中包括有机化学品、金属、土壤和灰尘。

Particulate matter is made up of a number of parts, including acids, organic chemicals, metals, and soil or dust.

youdao