However, we have seen one other fundamental paradigm shift during the past two decades.
然而，我们在过去二十年中已经见到另一个基本范例变动。
Yet during the past few decades, researchers have come up with intriguing insights.
然而，在过去的几十年中，研究人员们已经得到对此现象引人入胜的深入的理解。
Cassandra has had a tough assignment during the past three decades.
预言之神在过去的30年里任务很重。
在过去的四十年里。
During the past few decades, the average indoor temperature has increased.
在过去几十年间，室内的平均气温升高了。
During the past few decades, the average indoor temperature has increased.
在过去几十年间，室内的平均气温升高了。
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