前桅前方的帆

例句：

1. 1. The sailors were busy adjusting the sails on the mainmast.
   水手们在调整主桅上的帆。
2. 2. The captain had to make a quick decision about which mast to use for the next leg of the journey.
   船长必须迅速决定使用哪个桅杆来完成接下来的旅程。
3. 3. The crew was discussing how to secure the mainmast in case of strong winds.
   船员们正在讨论如何固定主桅杆以防强风。