self-supporting mast

例句：

1. 1. The ship's self-supporting mast was a major source of strength for the crew.
   这艘船的自给自足桅杆是船员们的主要力量来源。
2. 2.The captain decided to replace the old mast with a new one to improve the ship's self-supporting capabilities.
   船长决定用一个新的桅杆来提高船只的自给自足能力。
3. 3. The construction of this mast will require extensive testing to ensure its self-supporting strength meets industry standards.
   建造这个桅杆需要广泛的测试，以确保其自给自足强度符合行业标准。