The atmospheric concentration of methyl chloride (CH 3Cl) is very low, only at 10 -12 (V/V) level.

氯甲烷在大气中的浓度较低，仅为10 -12 级别。

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The atmospheric concentration of methyl chloride (CH 3Cl) is very low, only at 10 -12 (V/V) level.

氯甲烷在大气中的浓度较低，仅为10 -12 级别。

youdao