1·The ship travels over the seven seas.
这艘船航行七大海洋。
2·Some hypotheses fail to account for simultaneous extinctions on land and in the seas.
有些假说不能解释同时发生在陆地和海洋的灭绝。
3·As waves break up ice the seas will become more open, and the waves will get even stronger.
随着海浪打破冰层，海洋将变得更加开阔，海浪将变得更加强劲。
4·That may be one reason why so many people find relief in swimming when life's seas get rough.
这也许就是为什么当生活的海洋变得波涛汹涌时，那么多人在游泳中找到了解脱。
5·These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment.
这些海洋有一个典型的海底，只不过这个海底被几公里厚的沉积物覆盖。