ballast
🇺🇸
/ˈbæləst/
🇬🇧
/ˈbæləst/
Heavy stuff put on a ship or in a hot-air balloon to make it steady and less likely to move around.
The crew loaded the ship with ballast to prevent it from tipping over in rough seas.
船員裝載壓艙物以防在惡劣海況下翻船。
Stones or other material laid down to make a strong base for roads, railways, or other structures.
Workers spread ballast over the area to stabilize the railway tracks.
工人在該地區鋪設壓艙物以穩定鐵路軌道。