It's not difficult once you get the hang of it.

你掌握了要领就不难了。

《牛津词典》

Once you stop using your brain you soon go stale.

一旦你停止动脑筋,你很快就会变迟钝。

《柯林斯英汉双解大词典》

He's just a pussycat really, once you get to know him.

你了解他以后就会发现他实在和蔼可亲。

《牛津词典》

People think that once you get infected one time you develop immunity for the rest of your life.

VOA: special.2011.04.20

Then, once you've done that, once you have secured the integrity and accuracy of the meaning, Hirsch says, "Okay, fine.

在你完成那个之后，一旦你确定了意思的真实性和准确性，赫施说，好的，不错。

耶鲁公开课 - 文学理论导论课程节选

And once you... when you're having that bad of a season, it's really hard to get everyone passionate about it,

所以一旦赛季取得很差的成绩，就很难保持球队的激情，

足球部队长的领导力 - SpeakingMax英语口语达人

Once you are there, you can get around on foot, bike, motorbike or a hired taxi.

BBC: Old world charm on Taiwan��s outlying islands

Once you open the window a crack, you're gonna have to throw open the doors eventually.

CNN: Review: 'The Muppets' still finding its felting

Once you have been shepherded into the hamam you will be left to lounge on the heated marble.

BBC: A guide to Istanbul��s bath houses