U

n.

英语字母表的第21个字母；

u turn掉头

The u g r i z Standard-Star System
Postwar U.S business cycles: An empirical investigation
Natural Gas from Seaweed: Is Near-Term R&D Funding by the U.S. Gas Industry Warranted?
Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams
Guerilla Warfare & Law Enforcement: Combating the 21st Century Terrorist Cell within the U.S.
Design of Patch Antenna with Inverted U Slot for WiMax Application
Climate Change Effect on Thermal Power Cooling in the U.S.
A prospective study of cigarette smoking and risk of colorectal adenoma and colorectal cancer in U.S. women
Citizenship, College Degrees, and Occupational Outcomes:  A Comparison of Latino Immigrants and U.S. Natives at the Turn of the Cen...
Agenda and Notice of a Public Meeting of the State Advisory Committee Chairs of the Southern Region of the U.S. Commission on Civil ...