An outline cross section of a simple form of road is shown in the inset of Fig. 17. Here the principal terms relating to road construction are given.是什么意思_An outline cross section of a simple form of road is shown in the inset of Fig. 17. Here the principal terms relating to road construction are given.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句