The paper mainly proposed several basic shapes of expressway grade-separated widening and introduced its applied conditions for reference.
构想了公路立体拓宽的几种基本结构形式，介绍了其应用条件。
2
Again, after the lumber has been separated, the grader assigns a grade.
木材分开后，分级工再次标记等级。
3
Gold-bearing minerals are separated in the laboratory and the chemical analysis of each individual indicates that the gold grade for fine pyrites is 3.