正常情况下,树木是抵御污染的最佳卫士,但是当外界温度过高时,树木自身的防御机制实际上可能会令污染状况恶化。
Normally, trees are the best defence against pollution; but when it's too hot outside, the trees' own self-defence mechanism may actually make things worse.
正常情况下,树木是抵御污染的最佳卫士,但是当外界温度过高时,树木自身的防御机制实际上可能会令污染状况恶化。
Normally, trees are the best defence against pollution; but when it's too hot outside, the trees' own self-defence mechanism may actually make things worse.
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