during

1.在…期间all through a period of time

during the 1990s在 20 世纪 90 年代

There are extra flights to Colorado during the winter.冬季有飞往科罗拉多的增开航班。

Please remain seated during the performance.演出期间请不要站起来。

2.在…期间的某个时候at some point in a period of time

He was taken to the hospital during the night.他在夜间被送到医院。

I only saw her once during my stay in Rome.我在罗马逗留期间只见过她一次。