Yes, when most people think about cars and fuel, they think about all the carbon dioxide that's produced, but they don't realise that that wasn't always the case.

是的，当大多数人想到汽车和燃料时，他们想到的都是其产生的二氧化碳，但他们没有意识到情况并非总是如此。

youdao

I don't think you realise the gravity of the situation.

我认为你没有意识到形势的严重性。

《牛津词典》

Think of those fleeting moments when you look out of an aeroplane window and realise that you are flying, higher than a bird.

想想那些转瞬即逝的瞬间，当你从飞机的窗户往外看并意识到自己正飞得比鸟还高的时候。

youdao

It was a tough game, I don't think people realise how much the first half took out of us.

BBC: SPORT | Rugby League | Cup win is for Anderson - Wellens

And I think that most people, I think, realise that Virgin are willing to take risks and that's one of the reasons that the Virgin brand is, is, you know, world known, and world respected, because we do take risks.

BBC: News Online

"I think we all realise that the riots were an exceptional event but it's the case that if, for instance, a gang raids a bank then that counts as one crime even if there were four people in that gang, " he said.

BBC: More crimes added to police mapping website