If there is no self-confidence, it is really bad! If you don't believe in yourself, or doubt yourself, it's no worse.

要是没有自信心，那实在糟糕！要是你不相信自己，或者怀疑自己，那是再糟也没有了。

youdao

Pay attention to your internal dialogue, and learn to notice when you allow negativity or doubt to control the course of your thinking.

注意自己的内心对话，注意你什么时候让消极和怀疑控制了自己的思想。

youdao

We all tend to laugh with the group even when we didn't get the joke, or doubt our opinion we realize ours is unpopular among our group.

即使我们没听懂一个笑话，我们也更愿意跟着大多数人一起笑起来；当我们发现自己不被大多数人认可时，我们更倾向于怀疑自己的观点。

youdao

When I refer to my car as opposed to what we could doubt: the car stage or the car slice.

当我提到我的车,对照一下有疑问的地方：,车的阶段或者部分。

耶鲁公开课 - 死亡课程节选

or perhaps you doubt that something is the case.

或是你很怀疑是不是这么一回事。

I wonder if 课堂 - SpeakingMax英语口语达人

Why should doubt about the veridical or truth-affirming possibilities of interpretation be so widespread in the twentieth century?

对确认为真的解读可能性的怀疑,为什么会在20世纪如此普遍？

耶鲁公开课 - 文学理论导论课程节选

They insist any rejection or doubt of the GM-free status of Indian rice in the global market could threaten their trade.

BBC: NEWS | South Asia | India warned over GM rice crops

This is the stealth approach a monster thought uses to subtly undermine your better thinking to keep the environment in check, by dropping hints of questions or doubt.

FORBES: Big Ego, Big Business: 6 Famous Failures, and 4 Key Ideas For Keeping Your Ego in Check

The report says that on the evidence the MPs saw no reason to think the scientists dishonest or their science besmirched, or to doubt the consensus among climate scientists that humans are warming the world and will warm it further.

ECONOMIST: Green.view