Backfield
n. 后卫；守卫区
🗣️ 情景例句
But first in the school-rooms.
但首先是在教室 。
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
People are not so honest as they once were.
人们不再像以前那样诚实了。