F-20：fly in the face of 向……挑战

A:To be a revolutionary needs great courage!

A:要当革命者可真需要勇气呀!

B:He must be courageous enough to fly in the face of established authorities.

B：他得勇敢地向权威挑战。

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，还有许多其他人也是。