track_construction_train_有道手机词典

1.Because there should construction of railways, we want to do the train track sleepers too!
因为那里要修建铁路，我们要为火车轨道做枕木呢！
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2.The speed of train is high, to ensure regularity of the upper track and reduce maintenance workload, the requirements of settlement after construction of subgrade are extremely stringent.
列车行驶速度高，为了保证上部轨道结构的平顺性，并减少运营期间的维护工作量，对路基的工后沉降有着极其严格的要求。
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