fly in the face of
向……挑戰A:To be a revolutionary needs great courage!
A:要當革命者可真需要勇氣呀!
B:He must be courageous enough to fly in the face of established authorities.
B:他得勇敢地向權威挑戰。
A:Galileo is one of them.
A:伽利略就是其中之一。
B:So are Copernicus and many others.
B:哥白尼,還有許多其他人也是。