radical element

• 激进分子

radical element的用法和样例：

例句

1. A radical is a man with both feet firmly planted in the air.
   激进分子就是把两腿牢牢插在空气中的人。
2. A freethinker and radical, Darwin often wrote his opinions and scientific treatises in verse.
   他是个自由思想者和激进分子，常用韵文抒发思想和撰写科学论文。