ballast
Definition
Heavy material used to stabilize a ship or vehicle; anything that provides stability or balance.
中文 用于稳定船舶或车辆的重物，也是提供稳定或平衡的任何东西
Example
"The train uses ballast to keep the tracks firmly in place."
Heavy material used to stabilize a ship or vehicle; anything that provides stability or balance.
中文 用于稳定船舶或车辆的重物，也是提供稳定或平衡的任何东西
"The train uses ballast to keep the tracks firmly in place."