Some of them have the capability of becoming white blood cells, or leukocytes, of which there are many different subsets.
一些能够成为白细胞,或称白血球,白细胞又分很多的亚类
Before becoming President Bush's White House Chief of Staff, he was President Bush's Director of the Office of Management and Bugdet for three years.
在成为小布什的,白宫办公厅主任之前,他是,小布什的管理与预算办公室主任,在那里工作了三年。
Before becoming President Bush's White House Chief of Staff, he was President Bush's Director of the Office of Management and Budget for 3 years.
在成为布什总统的,白宫办公厅主任之前,他是布什总统的,白宫管理与预算办公室主任,任期三年。
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