1. From a heavy gun that was raised, the captain realized that the ship must have been a cruiser.
    从捞起的一门大炮来看，船长认为那艘船一定是艘巡洋舰。

2. For many years she has been puzzled as to why so many of the children in her study should be boys — at the top level, there are more boys than girls by a ratio of thirteen to one.
    多年来，她对为何她的研究中有那么多的男孩感到困惑 -- 高级组中男孩女孩之比为13比1。