Boy, it sure is hot!

嗬，真够辣的！

《牛津词典》

Boy, it sure is hot.

好家伙，这天儿可真热。

《牛津词典》

Scientists are continually learning more about sleep, but one thing they know for sure is this—for humans, it is as important as food and water.

科学家正在不断加深对睡眠的研究，他们对其中的一件事实确信无疑：对于人类来说，睡眠与食物和水一样重要。

youdao

He must be the stupidestson of a bitch alive, but he sure is fast.

VOA: standard.other

Why don't we give Philip both the matching pair and give you each a pair of socks since he didn't get to wear this one, they are brand new, in fact, and a big round of applause for what I'm sure is a little difficult.

我们为什么不给飞利浦一双配对的袜子,给你们每人一双袜子,他还没穿这双袜子，所以这双还算是全新的，再次以热烈的掌声对他们表示感谢,这样的模仿还是有一些难度的。

哈佛公开课 - 计算机科学课程节选

because it will give you an opportunity to say "I want to be sure that this is done, has been done"

因为用这个句型，你就能表达“我想确认这事会做到的，或者已经做到了。”

Make sure 课堂 - SpeakingMax英语口语达人

That--I mean, I've never met your neighbor, who I'm sure is a very nice person.

NPR: The Ethicist: Weighing a Canine Conundrum

"The only thing you can say for sure is that you're eating something, " said one taster.

WSJ: Choking Down Chocolate

The price of energy was not a huge issue in 2001, but it sure is now.

NPR: Analysis: Congress And The Cost Of Energy