in the last three years和in the past three years的区别

题目

in the last three years和in the past three years的区别
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答案

in the last three years可以是在指定的某一段时间里的最后三年或者是现在时间的前三年,可以是上世纪的最后三年：in the last three years of 20th century.或者06、07、08年.而in the past three years只能是指现在...