Approval isn't a certainty. Opposition to the express rail link has already delayed progress for months. Cost-conscious legislators point to an existing railway that runs below capacity.

此事能否获批尚不确定。对这一高速铁路项目的反对之声已经将工程推迟了数月。重视成本的议员指出现有一条铁路已在低于运能的情况下运营。

youdao

Disjuncts, in meaning, express the speaker's attitude to what he is saying, his evaluation of it, or shades of certainty or doubt about it.

评注性状语就是指说话人对他所说的话的态度或对话语内容进行的评价。

youdao

This is a great pattern that you can use to express a level of certainty,

这是一个很棒的句型，你可以用它来表示某种程度的肯定，

I'm sure 课堂 - SpeakingMax英语口语达人

So non-experts get more attention and can have more impact when they express certainty in their messages.

FORBES: To Lead Better, Lose Confidence

In any case, government attorneys present HHI scores as if they express scientific certainty that customers will be abused, while economists are often more skeptical.

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