They met again after a gap of twenty years.
他们阔别二十年后又见面了。
That gap had grown over recent years.
最近几年这种差距已扩大。
A few years ago it was fashionable to speak of a generation gap.
几年前，代沟是一个非常流行的词。
How many years do you think is one generation gap? Why?
你认为多少年为一代代沟？为什么？
Over the past few years the gap has been widening.
在过去几年里，这二者之间的差异一直在增大。
Over the past few years the gap has been widening.
在过去几年里，这二者之间的差异一直在增大。
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