| 1. | And , in research just published in the proceedings of the national academy of sciences , chang liu , of the university of illinois at urbana - champaign , and his colleagues describe the first attempts to do so
伊利诺大学香槟分校的刘昌（音）博士和他的同事们发表在《美国国家科学院学报》上的一篇文章介绍了这方面的初次尝试。 |
