But there's an acting attorney general. There is an acting chief of staff.

现在有代理司法部长和代理白宫办公厅主任。

They are saying they enjoy the general act of listening to music as they exercise.

他们说他们喜欢在锻炼时听音乐。

The Rocky Mountains in general act as sort of the high water tower of North America, as many of the continent's greatest rivers originate from the vast snowmelt taking place high up within them.

总的来说，落基山脉是北美的高水塔，因为该大陆许多最大的河流都源于在它们高处发生的大量融雪。