Dingyu born in Changchiakou, Hebei province, which is surrounded on three sides by high mountains, and very close to Inner Mongollia. The local environmental condition is special.

丁钰是河北省张家口市区人，当地环境特殊，三面环山，离内蒙古较近。

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Economy of special zone internationalized environmental condition, how to realize the ways of internationalization of special zone are the main points of the third part of this article.

特区经济国际化的环境条件、如何实现特区经济进一步国际化之路是文章第三部分论述的重点。

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"The residence was of such a poor environmental condition that it was unsafe for us to breathe the air, " said Special Agent James Ash of the Bureau of Alcohol, Tobacco and Firearms, according to a sworn deposition obtained by the BBC.

BBC: Why wild animals do not make good pets