instantaneous acoustic pressure

例句：

1. 1. The decision was made instantly.
   这个决定是立刻做出的。
2. 2. Themovie ended in an instantaneous flash of light.
   电影在一瞬间变成了一道闪光。
3. 3. The trainarrived instantly at the station.
   火车在车站一到达就到了。