你今天不像往常那么快快乐乐的。

You're not your usual cheerful self today.

《牛津词典》

我痛痛快快哭了一场，好受多了。

I felt a lot better after a good long cry.

《牛津词典》

我在海边痛痛快快玩了一天。

I had a grand day out at the seaside.

《牛津词典》

Used French only when she was a very good little girl. " Okay, Entendu. Now hop, hop, hop, Lenore, or you'll get soaked."

只有当她是个很乖的小东西的时候才讲法语“,“好吧，说定了，现在快点，快快快，不然就要湿透了“

耶鲁公开课 - 1945年后的美国小说课程节选

You need to let your body rest, so that you can get better quicker.

你要让你的身体得到充足的休息，这样你才能快快好起来。

Why don't 实战 - SpeakingMax英语口语达人

And so, amphetamines include drugs like "Speed" and "Coke."

安非他命类药物包括了,"快快"和"可口"

耶鲁公开课 - 心理学导论课程节选