I will never doubt that!

我永远不会怀疑这一点！

youdao

I never doubt that he is an unselfish person.

我从不怀疑他是一个不自私的人。

youdao

And to all of the little girls who are watching this, never doubt that you are valuable and powerful and deserving of every chance and opportunity in the world to pursue and achieve your own dreams.

我要告诉来观看演讲的小女孩，你们永远不要怀疑你们的价值和能力，你配得上每一个帮助你追逐和实现梦想的机会。

youdao

You never even had a small doubt that once his word was given, and a course of action decided, he would honor the letter and the spirit of the agreement."

VOA: special.2009.09.13

Margaret Mead, the anthropologist: "Never doubt that a small group of thoughtful, committed citizens can change the world.

人类学家Margaret，Mead说：,“永远不要怀疑一小群，有思想，坚定的市民可以改变世界。

哈佛公开课 - 幸福课课程节选

But,there was never any doubt that if he was restored to the throne that he would rule.

但毫无疑问的是,如果他复辟,一定会统治全国

耶鲁公开课 - 1871年后的法国课程节选

Never doubt that a small group of thoughtful, committed citizens can change the world.

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Never doubt that a small group of thoughtful, concerned citizens can change world.

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The BBC Middle East correspondent, Jim Muir, says there was never much doubt that the trial would result in a prison sentence.

BBC: Iranian reformer jailed