Why do we need a swimming pool? Everyone in the family hates swimming!
我们需要游泳池做什么呢?家里人都讨厌游泳。
It's only a suggestion,and you can do what you please.
它仅仅是一个建议,你能做你喜欢的东西。
Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.