Mid- is used to form nouns or adjectives that refer to the middle part of a particular period of time, or the middle point of a particular place.
例句
...the mid-eighteenth century...18世纪中叶Davis is in her mid-thirties.戴维丝35岁左右。
英汉词典释义
adj.
中间的,居中的, 中央的,中部的
Quills were the chief writing implement from the 6th century AD until the advent of steel pens in the mid 19th century.从公元6世纪到19世纪中期钢笔出现以前,羽毛笔是主要的书写工具。
(用于复合词中)中,中间的
The affair led to a mid-term Cabinet reshuffle (= when the prime minister/president changes some of the people in the Cabinet).这次事件引发了內阁中途改组。The air-conditioning quit on us in mid-July.空调居然在七月中旬撇下我们。The first grapes are harvested in mid- August.第一茬葡萄通常在8 月中旬收获。