The importance of the seas and oceans is brought home visually to us when we look at pictures of the earth from space and we realize once more that two thirds of the earth's surface is covered by the seas and the oceans.
当我们观看从空间拍摄的地球照片时，我们形象地看到了海洋的重要性，我们认识到，地球表面三分之二的面积都被海洋所覆盖。