There has been a build-up of troops on both sides of the border.
边境两边都在增加兵力。
2.?[C 可数名词] 大肆宣传
The build-up to an event is the way that journalists, advertisers, or other people talk about it a lot in the period of time immediately before it, and try to make it seem important and exciting.
双语例句
例：
The exams came, almost an anticlimax after the build-up that the students had given them.