dark action的用法和样例：
例句
- The dark green color comes from formalin acting on bile pigments in the liver from marked cholestasis, turning bilrubin to biliverdin.
福尔马林作用于发生显著胆汁淤积的肝脏中的胆色素，将胆红素转化为胆绿素而呈暗绿色。 - Dark energy, which works in opposition to gravity, shoves galaxies away from each other at ever-increasing speeds, making the universe expand at an ever-faster pace.
暗能量的作用方向与引力是相反的，以日益增加的速度推动星系相互远离，使宇宙的膨胀越来越快。
