Because there are those who have doubt about letting go of what you think of as the Third Dimension, or reality.

因为那里有你怀疑需要放下的，比如第三维度的想法或是现实。

youdao

"Somebody would have seen her."—"I doubt it, not on Monday."

“有人可能见过她。”—“我不信，不可能在星期一。”

《柯林斯英汉双解大词典》

Try and do it now if you have any doubt.

如果你有任何疑问，现在就试着去做。

youdao

Jurors only need to have a "reasonable doubt" a reasonable question in their mind that the person is guilty as charged.

VOA: special.2009.08.31

.. You mentioned earlier that you doubt... you have questions about whether this high rate of growth is sustainable?

您之前提到过您怀疑。,您质疑印度经济的高增长率,能否保持下去？

普林斯顿公开课 - 国际座谈会课程节选

Milton's similes are notoriously difficult as you no doubt have already experienced.

弥尔顿的明喻众人皆知的,非常难懂，正如你们已经领教过的。

耶鲁公开课 - 弥尔顿课程节选

It's human nature to have doubt and to have your own opinions.

BBC: Rape survivors open up about their experiences

Worse, Mashable published exactly how you can make people follow you, ensuring this problem will soon worsen unless Twitter fixes it fast and I have doubt that they will.

FORBES: Twitter's 2 Follower Bugs

You are an intelligent woman and you have worked as a journalist and I have no doubt you have seen first hand cases of benefit fraud in your newspapers.

BBC: Salisbury church magazine editor loses curfew appeal