turbulence

The 1960s and early 1970s were a time of change and turbulence.

20世纪60年代和70年代初期是个变革和动荡的年代。

There is, first, the New York of the man or woman who was born here, who takes the city for granted and accepts its size and its turbulence as natural and inevitable.

首先是纽约这座城市，在这里出生的男男女女们认为这座城市的存在是理所当然的，认为城市的规模和动荡都是自然形成的，是必定会发生的事情。

The plane encountered severe turbulence and winds of nearly two-hundred miles an hour.

那架飞机遇到了强湍流和时速近二百英里的强风。