自然科学 天文/地理 地球的温室效应【英文】ppt water on earth the
众所周知,海洋是生命的摇篮,地球上有70%的面积都是海洋,其中,它含有
unit we're trying to save the earth!
w 71% of earth's surface is covered with water are the water
the oceans cover over 70% of earth's surface
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