The ships had one large square sail.

该船有一个大广场帆。

Ships with square sails sail fairly efficiently with the wind abaft.

带有方形帆的船随风疾驰而去。

And suddenly they had a big bark ship with a beautiful white square sail.

突然之间，他们就有了一只大大的树皮船，还带着一张美丽的白色方帆。

And suddenly they had a big bark ship with a beautiful white 13 square sail.

突然之间，他们就有了一只大大的树皮船，还带着一张美丽的白色方帆。

The height or vertical dimension of a flag or of any square sail other than a course.

降下桁木，横帆之外的横帆或旗的高度或垂直距离。