This week Dr Townsend, and others involved in something called the international Nitrogen Initiative, are meeting in Paris to try to organise an international assessment of what is going on.

本周，汤森德教授和“国际氮倡议”(the International Nitrogen Initiative)等人士正在巴黎举行会议，试图整合目前进行中的一项国际氮气评估。

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