Ballasting
n. 压舱材料, 道碴材料
🗣️ 情景例句
I'm too deeply involved.
我已陷得太深，难以自拔了。
I haven't heard from him for a long time.
我很久没有收到他的信了。
Most of them were able to climb out in time. However four men were not quick enough to escape the flames.
大部分工人能够及时逃生。可是有4个工人来不及逃离火场。