Grading

(noun.) changing the ground level to a smooth horizontal or gently sloping surface.

录入:莱尔

• Because of these facts, engineers spend great sums in grading down railroad beds, making them as nearly level as possible. 伯莎M.克拉克. 科学通论.
• His experiments made him doubtful of the possibility of running such railroads, unless a great amount of very expensive tunneling and grading were first done. 鲁伯特·萨金特·荷兰. 历史性发明.

柏格编辑