adj. 上面的,高架的;头顶上的;(费用等)经常的,管理的;
n. 天花板;管理费用,经常费用;船舱的顶板;[体](网球等的)扣杀;
adv. 在头顶上;在空中;在楼上;向上;
over在上、在外、从上、越过 + head头 → 在头顶上的;架空的
🗣️ 情景例句
when the dog scratched on the front door.
当那狗在抓前门时。
There are three terms in a school year.
一学年有三个学期。
Twenty or thirty pages of information handed to any of the major world powers around the year 1925 would have been sufficient to change the course of world history.