n.

North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776

同義詞：United StatesUnited States of AmericaAmericathe StatesUSU.S.USAU.S.A.

the army of the United States of America; the agency that organizes and trains soldiers for land warfare

同義詞：United States ArmyUS ArmyU. S. ArmyArmyUSA

Where The Action Is: The Foundations of Embodied Interaction by Paul Dourish . MIT Press , Cambridge, MA, U.S.A. , 2001 . 229 pp., i...
Diagnosis of multiple cancer types by shrunken centroids of gene expression. Proc. Natl. Acad. Sci. U S A 99, 6567-6572
Nitrogen Retention in Rivers: Model Development and Application to Watersheds in the Northeastern U.S.A.
Nanocrystal targeting in vivo. Proc Natl Acad Sci U S A
Macrohabitat partitioning among three crayfish species in two Missouri streams, U.S.A
The neural code between neocortical pyramidal neurons depends on neurotransmitter release probability. Proc Natl Acad Sci U S A 94: ...
Composition of Bird Communities Following Stand-Replacement Fires in Northern Rocky Mountain (U.S.A.) Conifer Forests
Transformation of biochemically deficient strains of Bacillus subtilis by deoxiribonucleate. Proc Natl Acad Sci U S A
Anthropogenic nitrogen sources and relationships to riverine nitrogen export in the northeastern U.S.A.
T cell receptor signaling controls Foxp3 expression via PI3K, Akt, and mTOR. Proc Natl Acad Sci U S A 105, 7797-802