人类在过去的一百年左右止步不前。
Humanity has make little real pro GREss over the past century or so.
想想有多少人在过去的一百年丢了性命。
Just think how many lives were lost in the past hundred years.
在过去的一百年中，风剥蚀了这些岩石。
In the last hundred years, the wind has worn the rocks away.
人文学科在过去的一百年左右止步不前。
Humanity has made little real progress over the past century or so.
美国人的寿命在过去的一百年中翻了一倍。
Americans life expectancy has nearly doubled over the past century.
美国人的寿命在过去的一百年中翻了一倍。
Americans' life expectancy has nearly doubled over the past century.
人类历史在过去的一百年所发生的变化无疑是最大的。
The past hundred years have been among the most dramatic in history.
人类历史在过去的一百年所发生的变化无疑是最大的。
The past hundred years have been among the most dramatic in history.
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