naysayer
摇头族（指那些说某事成不了、经常否定、拒绝或者反对一些事情的人）
例句
Give up being a naysayer.
拒绝做否定主义者。
The Naysayer. This office dweller delights in shooting down ideas.
办公室里的这类人以扼杀想法获得乐趣。
One naysayer pointed out that these athletes were simply reverting to the mean.
一位反对者指出，这些运动员只不过是从巅峰状态回复到了平均水平。
