It consists of a complex mixture of solid and liquid particles of organic and inorganic substances suspended in the air.

它包括悬浮在空气中的有机和无机物的固体和液体复杂混合物。

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It consists of a complex mixture of solid and liquid particles of organic and inorganic substances suspended in the air.

它包括悬浮在空气中的有机和无机物的固体和液体复杂混合物。

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