certainly

"Certainly" 是由"certus"这个词根发展而来的，"certus"在拉丁语中的意思是"确定的"。 "Certus"也衍生出其他单词如：certify(证明)，certificate(证书)。

["adv. 当然；行（用于回答）；必定"]

I certainly don't deal drugs.

我当然不做毒品生意。

She certainly knows what's what.

她当然知道轻重缓急。

'Certainly not,' he replied emphatically.

“当然不。”他断然回答道。

你可以把 "certainly" 和它的词源 "certus"（确定的）联系起来，这样可以帮助你记忆这个单词的含义。

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Spain, even New York at the start,certainly China,there you weren't even able to provide the basics,

because I think we're setting ourselves up for trouble --trouble certainlyin how we relate to each other,

what the genes in our own bodies are doing,and certainly,eventually, our own evolution.

but the death toll is almostcertainly higher.You know, the problem is if

That math actually works?JS: Well, math certainly works. Math certainly works.But this has been fun.

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