train density的意思|示意
美 / trein ˈdensiti /
英 / tren ˈdɛnsɪti /
列车密度
train density相关例句
With the development of railway transportation, train density and speed have increased greatly.
列车运行密度不断增大,速度不断加快是铁路运输大发展的必然趋势.
互联网