i'm going to increase the size of my kitchen by six feet .这里的 by 启什么作用
问题描述：
i'm going to increase the size of my kitchen by six feet .这里的 by 启什么作用
答
by的这种用法所起到的作用就是描述：to the extent of (sth)例如：The bullet missed him by two inches.那子弹差两英寸就打中他了.The carpet is too short by three feet.那地毯短了三英尺.It would be better by ...