have the skin rubbed off one's hand; 把手蹭破了
That boy scraped his knee when he slipped and fell. 那个男孩摔倒时把膝盖蹭破了。
Mind the fresh paint. 小心蹭油漆。
dawdle; dillydally; 磨蹭
inch one's way forward; 一点点往前蹭
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)