n.刮东西时发出的刺耳声
adj.刮到的
动词scratch的现在分词.
The dog is scratching at the door. 狗正在抓门。
We've been scratching our heads for a solution to the problem. 我们一直苦苦思索，想找到解决这一问题的方法。
Stop scratching (yourself). 别再搔痒了。
Scratching the rash will make it worse. 丘疹越挠越坏。
