Are you absolutely certain about this?

你对这事绝对确信无疑吗？

《牛津词典》

She's absolutely certain she's going to make it in the world.

她确信自己将享誉全球。

《柯林斯英汉双解大词典》

I felt absolutely certain that I'd seen her before.

我确信自己以前曾见过她。

《柯林斯英汉双解大词典》

"Pakistan is absolutely certain that this war cannot be won by military force alone.

VOA: standard.2009.03.26

"As certain as she is sometimes and as absolutely gung-ho and young and courageous and brave, she is also willing to take a step back and go 'okay,I'm going to reconsider my options and how I'm treating everybody' because she acknowledges that she's being a little bit selfish.

VOA: standard.2010.07.07

Moreover, 51 percent of parents said they were "absolutely certain" to get it for their children.

CNN: To vaccinate or not? Some wary on H1N1 choice

And I would make absolutely certain that everyone knew that I was doing this as well.

FORBES: Krugman And The Cyprus Endgame: But What If 'Doing An Iceland' Succeeds?

If you are absolutely certain to have the solution, by all means, step forward.

FORBES: Seeking A True Understanding Of The Nature Of Entitlement