The ships had one large square sail.
该船有一个大广场帆。
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。
Therefore square-riggers cannot sail upwind.
因此方帆船无法逆风航行。
The sail is 32-square meters long.
该帆的面积有32平方米。
The sail is 32-square meters long.
该帆的面积有32平方米。
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