压仓石的英文

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。