在过去五十年间，地球一直在转暖。
在过去五十年间，社会等级差别已经变得不那么重要了。
Class distinctions have become less important during the last 50 years.
在过去的五十年里，我们的期望已经改变了。
我们国家在过去的五十年中经历了巨大的变化。
Our country has experienced great changes in the last fifty years.
科学在过去的五十年内有很大的进步。
Science has made great advances during the last fifty years.
五十年很快过去了，我们都能进入学校了。
Fast forward almost fifty years and we have education at our disposal.
在过去的五十年中出现了许多种新的疾病。
Many new diseases have been discovered in the last fifty years.
在过去的五十年里每个家庭在院子里建造了属于自己的附加小厨房。
Over the past five decades each family built a small add-on kitchen in the courtyard.
五十年过去了，他们仍然保持着婚姻关系。
Fifty years has passed, they are still married to each other.
在过去的五十年中死海失去了百分之三十三的表面积。
The Dead Sea lost thirty-three percent of its surface area during the last half -century.
在过去的五十年里，只有少数人由于叛国罪被审问过。
Only a few persons have been tried for treason in the past 50 years.
在过去的五十年里发生了巨大变化。
在过去的五十年里发生了巨大变化。
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