动词 grate:

1. furnish with a grate

2. gnaw into; make resentful or angry

3. reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface

4. make a grating or grinding sound by rubbing together

5. scratch repeatedly

graten.栅；壁炉vt.装格栅于v.磨擦；磨碎；（使）烦恼Gratereau格拉特罗grate bed篦床grate bar炉篦炉条,炉篚,筛条gratelessadj.无格栅的Grateloup格拉特卢grate size筛块grate mill格子型球磨机,格子式磨碎机,栅条磨,格子排料式磨机grate kiln链篦机-回转窑grate bars篦条grate ring炉排座圈

1. The teacher's chalk grated on the blackboard.
   老师的粉笔在黑板上发出刺耳的摩擦声。