论文部分内容阅读
两匹马各拉一辆大车。前面的一匹走得很好,而后面的一匹常常停下来。于是主人就把后面一辆车上的货挪到前面一辆车上去。等到后面那辆车上
Two horses each pulled a cart. The one in front went well, and the latter one often stopped. So the owner moved the goods from the back of the car to the front of a car. Wait until the back car