The photochemical fog is one kind of the atmosphere pollution. It endangers not only people's health but also the balance of the ecosystem.
光化学烟雾是大气污染的一种,它不仅危害人们的健康,而且严重威胁着生态系统的平衡。
The photochemical fog is one kind of the atmosphere pollution. It endangers not only people's health but also the balance of the ecosystem.
光化学烟雾是大气污染的一种,它不仅危害人们的健康,而且严重威胁着生态系统的平衡。
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