machine for ballasting

例句：

1. 1. The ship's captain carefully balanced the weight ofthe cargo to ensure stability.
   船长小心翼翼地平衡了货物的重量，以确保船只的稳定性。
2. 2. Theengineer used a hydraulic systemto stabilize the bridge during high winds.
   工程师使用液压系统在大风中稳定桥梁。
3. 3.The construction crew had to balance the loadon the crane to avoid tippingover.
   建筑工人不得不在起重机上平衡负载，以免翻倒。