middle /ˈmidl/ I. adj. 中间的；中等的: graduate from middle school中学毕业 ‖II. n. (the middle sing.)中部；中间: He will be back about the middle of next month. 他将于下月中旬回来。The man in the middle is his father.中间那个人是他父亲。in the middle of…在…当中: A man is lying in the middle of the road.一个人躺在大路中间。
middle-class adj.中层社会的，中产阶级的：Society is divided into upper, middle and lower classes.社会分为上层、中层和下层阶级。
