widely known 家喻户晓
talk endlessly 滔滔不绝
in the blink of an eye 瞬间
operating speed 运行速度
roadbed 路基
bridge 桥梁
ballastless track 无砟轨道
rail gap 轨缝
expansion and contraction 热胀冷缩
temperature stress 温度力
magnetically levitated train 磁浮列车
maglev train 磁浮列车
wage -price spiral 工资和物价不断螺旋式地上涨
anti-monopoly law 反垄断法
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