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。

youdao

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