压仓石的英文：
ballast

They ballasted the ship.
他们给船只装压舱物。

They ballasted the railroad.
他们给铁路铺道渣。

The ballast placed in the ship can keep the ship steady.
放在船上的压舱物可以保持船的平稳。

The mean temperature of ballast is decreased with increase of its thickness.
碎石体的平均温度随碎石厚度增加而降低。

He stated that his training had given him ballast and a sense of responsibility.
他说他所受到的训练使他变得坚定，并且具有责任感。