These are word's definitions related to ballast. Click on any word to go to its word's detail page. Or, 更多关于ballast的信息
0 heavy matter such as sand or stone that is used at the bottom of a ship or a hot-air balloon to make it heavier, or the small stones on which railways and roads are made
最新单词
European
2021年8月16日
每日一词
Shimmer