Task: Translation
Input (Chinese): 美国参议院于星期三一致确认了对迈克尔·格里芬博士出任国家航空与航天局（NASA）局长的提名。他将成为这个以美国为基地的空间机构的第11任掌门人。
Output (English): The U.S. Senate unanimously confirmed on Wednsday the nomination of Dr. Michael Griffin to head the National Aeronautics and Space Administration (NASA), making him the 11th administrator of the US-based space agency.