So to find out more, scientists Mr Brian Davis, Dr Gang Li and Professor William Murphy conducted an analysis of the DNA of all these species.

为了找出一个答案，科学家布莱恩戴维斯，李刚博士以及威廉姆艾菲教授对这些品种的DNA进行了分析。

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William Davis,a Washington-based director of the United Nations Information Service.

VOA: standard.2009.10.19

Now he is the linchpin in Chief Executive William Davis ' plan to remake the 138-year-old company.

FORBES: Pressing For Change

Now he is the linchpin in the plan of William Davis, the ceo, to remake the 138-year-old company.

FORBES: Pressing for change

William Davis, for the NMC, stated it was "not said that she was directly and personally responsible for the numerous examples of poor care" delivered by staff at Mid Staffordshire NHS Trust.

BBC: Ex-Stafford Hospital chief nurse 'intimidated staff'