动词 knock 指“猛烈击打/碰撞”, knock sth. over 意思是“把某物弄翻/打倒”,可以引申为“把事一下子做完”,如:
Look out! Don't knock the stool over. 当心,别把凳子碰倒了!
Mike can knockover three or four of those simple drawings in a day. 迈克一天可完成三四张那样简单的图画。
动词 turn 指“绕着一个轴或中心移动”,turn sth over 意思是“把某物翻转过来”或者“把某物从一边滚向另一边”,可以引申为“ 移交某物”或“再三考虑某事”,如:
He picked up the blue envelope and turned it over curiously... 他拿起蓝色信封,好奇地翻过来看。
The lawyer turned the release papers over. 律师提交了释放文书。