船员们增加了压舱物以确保船只在暴风雨中保持稳定。

The crew added more ___ballasts to keep the ship steady during the storm.

工人们正在为铁路路基铺设新的道砟。

The workers are laying new ___ballasts for the railroad foundation.

他的幽默感在压力时期起到了稳定作用。

His sense of humor served as ___ballast during stressful times.