n.压舱材料(道渣材料)
Pig iron used as permanent ballast. 压载铁做为永久性压舱物的生铁
The ship was furnished with ballast. 船上装了压舱物。
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 ballast may be thrown out to make the balloon go higher. 沙袋可以拋掉以使气球飞得更高。
Not stabilized or properly stabilized by ballast. 不稳定的未用压舱物稳住的
