a situation or society that changes in a way that is meant to improve people’s lives but is often a source of extra problems美好的新世界（本欲改善人们的生活，实则带来预料不到的问题）
the brave new world of technology科技进步的美好新世界
the architects' vision of a brave new world of pristine concrete建筑师想象中的由崭新混凝土建筑构成的美好新世界