Theoceansareuniqueto的精選

問題詳情： Theoceansareuniquetoourplanet.Nootherplanetinoursolarsystemhasliquidwater.Theoceanscoverabout70%oftheearth'ssurface. Theycontainabout97%oftheearth'swatersupply.Lifeonearthoriginatedinthes...