这条船船头是圆的，船尾则是方的。
The boat is rounded at the front but squared off at the back.
船尾那里有一个方孔，大小只够我父亲膝盖顶着下巴挤进去。
There was a square hole just large enough for my father to fit into if he pulled his knees up to his chest.
最后，来介绍这种巨大的三桅杆方帆船，带有五对方形帆和数面前帆，船尾还有一面大三角帆(lateen sail)。
Finally, here’s a large three-masted square-rigger flying five tiers of square sails and several head sails, with a lateen sail aft.
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