knocking against短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 撞击；与…冲突；偶然遇见 A magnetic holder screwed to the wall is a practical way of keeping knives always within reach and isolated from other objects that could dull and dent the blades by knocking against them. 在墙上钉几个磁性支架来存放刀具是个不错的方法，既方便取用，又能把刀具跟其他物品分开，免得磕磕碰碰地弄钝弄花了刀刃。 yeeyan