took their own course

• v. 照自己的意思去做(一意孤行)

took their own course的用法和样例：

例句

用作动词 (v.)

1. Well,you many have it your own way.
   那么，就照你的意思去做吧。
2. Ironically, this feeds the rich man's paranoia that people are only doing what he wants for fear of losing their job or their privileges.
   讽刺的是，这助长了他的妄想，认为别人由于害怕失去工作或特权就只会照他的意思去做。