我们每天做的最多的事,不是吃饭更不是睡觉,而是进门和出门。你看,我们每天要上学、工作,首先就要跨出家门,然后,进进出出各种各样的门:车门、校门、教室门、食堂门、办公室门……或许还有商场超市的门,而其中很多扇门还需要重复进出;如果外出旅行, The most things we do everyday are not to eat nor to sleep, but to go in and out. You see, every day we go to school, work, we must first cross the door, and then, out of a variety of doors: doors, school doors, classroom doors, canteen doors, office doors ... and perhaps the mall supermarket door , But many of them also need to repeatedly access the door; if traveling,