off chance

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If a country grabs this one-off chance for productivity gains and investment, economic growth can jump by as much as a third.
如果一个国家能抓住这个生产力增长和投资的一次性机会，其经济增长将可能猛增三分之一。
Some of you might be wondering how to get back into the game operating system, for the off chance that you might want to play a game or two on your PS3.
您可能会疑惑如何回到游戏操作系统中呢？因为您可能会希望玩 PS3 上的一两个游戏。
It may not be the most appealing aspect of work, but developing references for the off chance that you are going to need them in the future is a crucial part of working.
这或许不是工作最有吸引力的一面，但为那万分之一的机会，发展这些你将来可能用到的参考，是工作中的一个关键部分。

Often,he would pass islands with strong enemy forces, cut off their supplies and leave them with no chance to fight.
But it's really a chance, especially for those less comfortable, to be set off on a very specific path.
这的确是一个机会，特别对于那些不怎么舒适的，这是通过,特殊途径开始的好机会。
哈佛公开课 - 计算机科学课程节选
I mean, here I was... I don't get that much of a chance to go off campus
我是说，在这儿……我没有那么多机会走出校园，
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On the off chance you were going to get them the same thing for Hanukkah or Christmas, just get them something else instead.
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