1.take on 与(尤指实力比自己强的人)较量;接受……的挑战
例句:Democrats were reluctant to take on a president whose popularity ratings were historically high.
民主党人不愿与一位有史以来民众支持率最高的总统较量 。
2.mainstream n. (思想或行为的)主流;主要倾向,主要趋势
例句:Animation has stopped being eye-candy for kids and geeks and become mainstream entertainment.
动画不再仅仅吸引小孩子和动漫迷的眼球,而成了主流娱乐方式 。