middle

1.in the middle of里用in，如in the middle of the street，in the middle of the night，in the middle of his work和in the middle of breakfast。但在month和year前面偶尔用at，如at the middle of the present year。

2.关于middle age和the Middle Ages，参见age 8。关于middle class(es)，参见class 5。关于Middle English，参见English 3