in 4 years / in 4 years' time
问题描述：
in 4 years / in 4 years' time
四年之内.
四年后?
答
in four years,四年中.
It was the first cut in four years.
这是四年中第一次削减利率.
in four years' time,四年以后.
The Olympic Games will be held in our country in four years' time.
四年以后,奥林匹克运动会将在我们国家举行.