What do you know about the sea?  Some people have seen it but others haven't. The sea looks beautiful on a fine sunny day and it can be very tough when there is a strong wind. What other things do you know about it? Of course, the sea is very large. In the world there is more sea than land. If you have swim in the sea, you know that the sea is salty.  Rivers carry salt from the land into the sea. Some  places of the sea are saltier than the other places. Do you know the Dead Sea? It is so salty that you can't sink when you are in the  water! And fish cannot live in it!

　　译文：你对大海了解有多少？有些人曾经见过，但有些人并没有，大海可以在晴天看上去很美，当刮风的时候，看上去很凶狠。还有一件事情你肯定知道，当然，那就是大海非常大，在这个世界上，跟土地比，海洋要大得多。如果你在海里游泳过，你就会知道，大海是咸的。河流从陆地带来盐分到海里，不同地区的咸度也不同。你知道死海么，咸到没有鱼类可以在里面生存。