中国南京一处繁华的广场上发生了一件新鲜事。

A busy public square in the Chinese city of Nanjing is home to an unusual experiment.

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我的家乡在中国南京，那是一个在中国南部的城市。

My home in Nanjing, China, it is a city in southern China.

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实验中所用的紫外辐射强度与中国南京地区冬季日光辐射强度相当。

The level of the UV radiation used in the experiment was similar to the normal solar irradiation in Nanjing region of China.

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