Freezing mud that reached tracklevel could derail a train, and rock salt kept the mud soft.
铁轨周围结冰的泥土会造成火车脱轨,岩盐可以使泥土保持松软。
2
With women a second factor comes into play, most seem to enjoy the flexible-time arrangement (once known as the "mommy track") and never find their way back to full-time or high-level employment.