激进分子

例句：

1. 1. The radical party has been actively promoting social change.
   这个激进党派一直在积极地推动社会变革。
2. 2. He was a radical in the labor movement.
   他在劳工运动中是一个激进分子。
3. 3. Radicalism is often associated with extreme political views and actions.
   激进主义通常与极端的政治观点和行动联系在一起。