An opportunity like this comes once in a lifetime.
像这样的机会一生也许只会遇到一次。
All jazz lovers should come to the Montreal International Jazz Festival at least once in a lifetime.
所有的爵士爱好者一生中都应该至少来一次蒙特利尔国际爵士音乐节。
They can attend to several things at once in the mental scratch pad called working memory, an essential skill in this era of multitasking.
他们可以在大脑的“工作记忆”区同时处理几件事，这是这个多任务时代的一项基本技能。
There is no reason why you couldn't live it up once in a while.
没有理由不让你偶尔尽情玩乐一下的。
Your body, like any other machine, needs a full service once in a while.
你的身体就像其他机器一样，偶尔也需要一次全面保养。
Have a pleasant trip, enjoy yourself, and remember your friends once in a while.
祝你旅途愉快，玩得开心，偶尔想念一下你的朋友。
Every once in a while the instructor makes a witty remark, causing others in the class to laugh.
每隔一段时间，老师就会说一句诙谐的话，让班里的其他人都笑了起来。
But I'll send you an email or call you once in a while.
不过我会时不时给你发邮件或打电话。
He comes to our room for a chat every once in a while.
他偶尔来我们房中闲谈。
Slip away once in a while for some private time.
适当离开一段时间，为自己找个私人空间。
Life throws everyone curve balls once in a while.
生活时不时丢给大家曲线球。
One last thing — silence is okay once in awhile too.
最后一件需要强调的事情是：片刻的沉默也是被容许的。
It's fun to cook once in a while, but not every day.
偶尔做饭很有趣，但天天做就不行了。
Only once in a lifetime that a special dream comes true.
一生中只有一次美梦实现的奇迹。
We started off at once in search of the missing child.
我们马上出发寻找那个失踪的孩子。
You shouldn't lose this once in the blue moon chance.
你不该错过这个难得的机会。
Try to separate yourself from your behavior once in a while.
试着偶尔把你和你的行为分开。
India is one of the places where everyone must go once in his life.
印度是每个人一生中都应当造访一次的地方。
FANCY a three-day weekend - not just once in a while but week in week out?
幻想一下要是周末有三天——不是指偶尔这样，而是每周都这样，那会怎样呢？
And I stubbornly believe that such love can only be experienced once in my life.
而我，固执的相信，这种情感，在我的生命中，只有一次。
So it's good to procrastinate once in a while in order to recharge yourself.
所以，为了给自己再次充电，偶尔拖延一次是很有好处的。
It gets weaker every time you ignore it so listen to it every once in a while.
而你越忽视(内心)，心灵的声音就越微弱，因此，你需要时常倾听自我心声。
It gets weaker every time you ignore it so listen to it every once in a while.
而你越忽视(内心)，心灵的声音就越微弱，因此，你需要时常倾听自我心声。
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