Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
A、emphaticallystatedWhile Billie Holiday did not invent the music called "the blues", she most assuredly helped popularize it.
Communication is one of the most important bonds that hold cultural systems together.
Some sea urchins海膽 have venomous (toxin) spines
Urban renewal programs strive to upgrade areas that are becoming slums.
The future survival of the bald eagle is still an important American ecological concern.
