Now that I've seen how he lives, I know why he needs so much money.
看过了他的生活状态,我现在才知道他为什么需要那么多钱。
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.
100年前,我们只知道海洋是二维平面形的,以及靠近陆地浅水区的深浅不一能给航行带来危险。