ballast

2026-05-02

n.(船中保持平衡的)压舱物; (热气球的)镇重物; (用作公路或铁路路基的)道砟vt.给某物装上压舱物; 给…铺道渣; 使稳定; 使沉着 过去式：ballasted过去分词：ballasted现在分词：ballasting复数：ballasts第三人称单数：ballasts 牛津词典 noun （船中保持平衡的）压舱物；（热气球的）镇重物heavy material placed in a ship or hot-air balloon to make it heavier and keep...