在2007年，NASA的科学家联合俄罗斯科学家乘船考察了这条河的变迁(为时三周)，以及这种类型的生态系统可能如何被气候变化所影响。

In 2007, NASA scientists joined Russian scientists to travel down the river by boat for three weeks to study the transition and how these types of ecosystems may be affected by climate change.

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我们只需注意一点，涡轮机应该放置在什么地方以及如何放置，’马拉博士说（马拉博士，研究包括气候变迁及栖息地流失等对鸟类的威胁）。

we just have to be careful where and how we put the turbines,” said Dr. Marra, who studies threats to birds, including from climate change and habitat loss.

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提出制度配置就是要从理论上弄清制度的地位、制度安排之间的相互关系以及如何进行制度变迁。

Advancing the theory involves finding out the interrelation between the position of system and the arrangement of it as well as how to carry out system changes.

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