ba
llast
复数形式
ballasts
1
压载物, 稳定配重
a heavy substance placed in a ship's hull or an airship's tanks to lower its center of gravity and counteract unwanted tilting, rolling, or drifting
- Submarines flood their ballast tanks to dive and pump them out to resurface safely.
潜水艇淹没其压载水舱以潜水，并泵出它们以安全上浮。
- To climb above the mountain pass, the dirigible pilot jettisoned ballast sandbags.
为了爬升到山口上方，飞艇飞行员丢弃了压舱物沙袋。
- The passenger ferry adjusted its ballast water before docking to maintain an even keel.
客轮在停靠前调整了其压载水以保持平稳的龙骨。
- Modern racing yachts pump water ballast between tanks to adapt quickly to changing wind conditions.
现代赛艇在储罐之间泵送水 压舱物 以快速适应变化的风况。
- Naval architects calculated the optimal ballast distribution for maximum stability in rough seas.
海军建筑师计算了压载物的最佳分布，以在汹涌的海面上实现最大稳定性。
2
an electrical device used to start and regulate the current in fluorescent or discharge lamps
- The electrician replaced the faulty ballast in the ceiling light.
- A new electronic ballast made the lamp more energy-efficient.
- Without a working ballast, the fluorescent tube kept flickering.
- The ballast controls the voltage to prevent the bulb from burning out.
- Technicians installed dimmable ballasts to adjust light intensity.
同义词：
3
something that provides mental, emotional, or moral stability
- Her calm judgment served as ballast during the crisis.
- Friendship can be a ballast against the stresses of modern life.
- His sense of duty was the moral ballast of his leadership.
- The teacher's patience acted as a ballast for the unruly class.
- Reading philosophy gave him ballast in times of uncertainty.
4
crushed stone laid to form a stable foundation for roads or railway tracks
- Workers spread fresh ballast beneath the railway ties.
- The track ballast helps drain water and keep rails properly aligned.
- Construction crews used granite ballast for the new highway bed.
- Regular maintenance includes cleaning and replacing worn ballast.
- The train's weight compresses the ballast, improving track stability.