Ménluó Zhǔyì shì Měiguó wàijiāo zhèngcè de jīshí zhī yī.
The Monroe Doctrine is one of the cornerstones of American foreign policy.
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门罗 is used for various people named Monroe, including US President James Monroe and actress Marilyn Monroe (玛丽莲·门罗). The Monroe Doctrine (门罗主义) is an important historical term in Chinese political discourse.