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持懷疑態度的人;(尤指在宗教或政治方面)信仰不堅定的人
If you refer to people as doubters, you mean that they have doubts about something, especially their religious or political system.
例句
Some doubters fear this news may not be as good as it appears.
有些持懷疑態度的人擔心這條新聞并非像報道那般美好。