在太平洋，菱皮龟的数量在过去三十年呈直线下降的情况。

In the Pacific, the number of leatherback turtles has plummeted in the last three decades.

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中国过去三十年空前的经济增长已经付出了巨大的环境代价。

China's unprecedented economic growth over the past 30 years has come at a huge cost to the environment.

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过去三十年出现了30多种新型人类传染病，其中大部分源自动物界。

More than 30 new human infectious diseases have emerged over the past three decades, most of them originating in the animal world.

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s up to the Fannie Mae or Freddie Mac to collect mortgages over the next thirty years So let me make sure I have the sequence right Housing prices extremely high among other entities congress place pressure on the banking systems they were ordinary banking systems to make loans more and more affordable.

结果是房地美和房利美，And，it’,在过去三十年收集全国贷款,让我整理一下顺序,房价很高,及其他政府机构,给银行压力,即普通银行,放贷给民间,让更多人买得起。

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