英语怎么讲??

一夜情
词性及解释
n.
one night stand (ONS); one night stay ;for one night (sex省略，常用419 four one nine近音替代);a single sexual encounter (typically the first) between individuals where at least one of the parties has no immediate intention or expectation of establishing a longer-term sexual relationship.
常用短语
I was hoping for a lasting affair, not just a one-night stand. 我希望的是长久恩爱，而不是一夜露水之欢。
No, I'm not still going out with Margaret. Anyway, that was only a one-night stand.
不，我没和玛格丽特在继续谈恋爱，我们俩只有过一夜关系而已。
近义解释
“一夜情”顾名思义是指发生在一夜之间的情事，有的认为英语世界里的“一夜情”One Night Stand，通常是指发生在两个陌生人之间，短暂的亲密接触，无须了解，也无须责任。在中文世界里，一夜情最确切的解释应当是：一夜性。即“一夜情”是一种偶发的性行为，通常仅只一次，也可能是有限的两三次，强调双方均基于性欲求的特点，拒绝感情与责任，常发生在并不熟悉的人之间。

One night stand
参阅文章
Once the one-night stand is over, leave the relationship then and there with mutual agreement. If both the parties agree for it you can continue the relationship occasionally. However it would be better if there is no carry over of this immoral relationship. You must keep your dignity while respecting the personal life of your one-night partner and must not boast these over night adventures at public. When everything is over, just sit and ponder for some time what have you obtained from entering into a one-night stand.

one night stand（缩写是ONS）
或者for one night（缩写是419）

one-night love

One Night Stand/One Night Only