怀疑论者

例句：

1. 1. He has a great ambition to become a successful entrepreneur.
   他有一个成为成功企业家的伟大抱负。
2. 2. Her ambition is to become a doctor and help people.
   她的抱负是成为一名医生，帮助人们。
3. 3.His ambition for success is to leave a positive impact on the world.
   他对成功的抱负是给世界留下积极的影响。