I am certain of it, especially if it's difficult for a competitor to copy.

我对此非常确信，尤其是当竞争对手很难抄袭的时候。

youdao

I am certain he reports my every move.

我确信他把我的一举一动都报告给他们了。

youdao

But the poets, I am certain, would object.

但对于诗人来说，我十分确定，他们定会反对。

youdao

President Kennedy once said: "I am certain that after the dust of centuries has passed over our cities, we,too,will be remembered not for our victories or defeats in battle or politics, but for our contribution to the human spirit."

VOA: special.2010.10.29

I am certain we would know that George Washington was the commander of our forces in our battle.

我十分确信你们都知道,乔治·华盛顿是战时美国军队的指挥官

耶鲁公开课 - 古希腊历史简介课程节选

And I get down to a certain card and I am stumped, so I will leave a space waiting for that card to appear on cue.

我遇到某张牌,会被困住，我会留些地方给,恰好要出现的牌。

麻省理工公开课 - 固态化学导论课程节选

But I am certain that uncertainty about the sequester is not going to improve anything.

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Ambassador CROCKER: I am certain that abandoning or drastically curtailing our efforts will bring failure.

NPR: Petraeus, Crocker Brief Congress on 'Surge'

But I am certain that this national security team probably isn't going to come up with it.

NPR: The Military Perspective