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大海这个词,人们并不陌生,不论见过海的还是没见过海的,都知道海是大的,而且大得无边无际。那么它到底有多大呢?让我们先看看下面一组数字:地球的表面积约5.1亿平方公里,海洋就占了其中的71％。海洋的体积约13.7亿立方公里,海洋的平均深度3800米,最深的马里亚纳海沟为11034米。当然,这些数字是枯燥的,那就拿个地球仪来看看,上面蔚蓝色的大海远比黄绿色的陆地要大得多,地球简直可称为一个水的星球和海洋的星球了。
The word sea, people are no stranger to the sea, have seen the sea or have not seen the sea, all know the sea is big, but immense boundless. So how big is it? Let us take a look at the following set of figures: The Earth’s surface area of about 510 million square kilometers, the ocean accounted for 71% of them. The volume of the ocean is about 1.37 billion cubic kilometers, the average depth of the oceans is 3800 meters, and the deepest Mariana Trench is 11,034 meters. Of course, these numbers are boring. Take a globe and look at it. The blue sea above is far greater than the yellow-green land. Earth can be called a water planet and a sea planet.