For millennia, migration has been a human adaptive strategy in the face of poverty, resource scarcity, ethnic or religious tensions, violent conflict or other push factors.
54. 数千年来，移徙一直是人类在面临贫穷、资源匮乏、族裔或宗教紧张局势、暴力冲突或其他推动因素时的适应战略。