ballonnement

例句：

1. 1. 球状物，球形物体；2.使成球形；3.
   在建筑中
2. 1. The engineer had to adjust the ballast to balance the weight of the new equipment.
   工程师必须调整球重以平衡新设备的重。
3. 2.The ballast was carefully placed in the center of the room to even out the lighting.
   球重被小心地放在房间中心，以平衡照明。
4. 3. In ballet, the ballet dancer must be perfectly balanced on their feet to perform graceful movements.
   在芭蕾舞中，芭蕾舞者必须在脚上保持平衡，以执行优美的动作。