mast ball

例句：

1. 1. The sailors were busy fixing the mast ballduring the storm.
   在暴风雨中，水手们忙着修理桅杆球。
2. 2. The captainhad to make a difficult decision about themast ball.
   船长不得不做出一个艰难的关于桅杆球的决定。
3. 3. Thecrew was discussing how torepair the mast ball afterthe shipwreck.
   船员们在讨论如何修复船难后的桅杆球。