skeptic a doubter怀疑论者
N-COUNT(可数名词) If you refer to people as doubters, you mean that they have doubts about something, especially their religious or political system. (宗教和政体的)怀疑者 [usu pl]
Some doubters fear this news may not be as good as it appears.
一些持怀疑态度的人担心这条新闻可能并非像其表面上那样美好。