基本解释刮板式平路机英汉例句双语例句The simplest type of road, built to carry little traffic, is made by scraping and pushing the earth with a grader.为担负少量运输量而修筑的最简易的道路是用平地机将地面推铲平整而成的。scraping grader更多例句专业释义经济学刮土平地机