Ballast is any substance that is used in ships or hot-air balloons to make them heavier and more stable. Ballast usually consists of water, sand, or iron. 压舱物
noun [专属名词]压舱物,[建]压载物;道渣,碎石
A "global ballast partnership" hopes to reduce this risk. 一份名为“全球压舱物伙伴”的协议便是旨在减少这种风险。
verb [vt. 及物动词]vt. 给……装压舱物;给……铺道渣
Ballast water is carried in cargo ships to provide needed stability. 压载水由货船装载,以提供必要的稳定性。