The clouds move around the world and produce rain.云在空气中漂浮,并产生雨。
This rain is like an acid and it destroys trees, plants, rivers and fish when it falls.落下的雨呈酸性,破坏了树木、植物、河流及鱼类。
The more trees it destroys, the more difficult it is for nature to redress the balance.树木被破坏得越多,大自然就越不容易重新取得平衡。
The burning of fossil fuels must be controlled in order to assist in the prevention of acid rain.为了防止酸雨,必须控制燃烧矿物燃料。
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