我和一个朋友住在一起，他实际上在另一个研究生院，研究公共卫生。

I live with a friend who's actually in another graduate school, doing public health.

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全国各地的研究人员被召集到一起，共同研究这项新体系。

Researchers were brought in from all over China to develop the new system.

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全国各地的研究人员被召集到一起，共同研究这项新体系。

Researchers were brought in from all over China to develop the new system.

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