"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》

youdao

I really doubt it.

我真的很怀疑。

youdao

"It's a little surprising, but I doubt it's going to go very far, mostly because of his age,"

VOA: standard.2009.10.30

I doubt it.

我很怀疑

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So, when in doubt, if you're having some weird character issue, odds are you need to escape it in some way.

如果你有拿不准的字符,可能就要用到转义字符了。

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"I doubt it will backfire on ticket sales, " Barrand, of the Sport Industry Group, told CNN.

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For most items I doubt it, especially when you factor in the price of gas.

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As to whether new leader DeMaurice Smith and the union will use it, I doubt it.

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