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1·He had taken a flight to Paris on the off-chance that he might be able to meet Francesca.

他搭飞机去了巴黎，怀着遇到弗朗西丝卡的渺茫希望。《柯林斯英汉双解大词典》

2·I'll go on the off-chance of seeing her.

我想去一趟，看能不能见到她。

3·Make small change to the code on the off-chance that it might solve the problem

对程序做一些小的改动，尽管解决问题的机会极小；

4·I was willing to fail again and again for off-chance I might come across something that gave me an extra boost.

我总以为自己会碰到一个妙不可言的好点子，抱着这微乎其微的希望，我经历了一次又一次的失败却依然乐在其中。

5·Come off it! We don't have a chance.

别胡扯了！我们没机会。《牛津词典》

6·People who had worked solidly since Christmas enjoyed the chance of a Friday off.

自圣诞节连续工作到现在的人们星期五可以有机会放假一天。《柯林斯英汉双解大词典》

7·I didn't think you'd be at home but I just called by on the off chance.

我想你不会在家，只是碰碰运气顺路来看一下。《牛津词典》

8·Take plenty of breaks, because they offer a double bonus: the time off gives your mind a chance to do some preliminary consolidation and it also gives a memory boost to the learning.

多休息，因为休息有双重好处：休息能让你的大脑有机会进行一些初步的巩固，也能提高学习的记忆力。

9·Sheer chance quite often plays an important part in sparking off an idea.

纯粹的运气常常在激发思想方面起着重要的作用。《柯林斯英汉双解大词典》

10·She scanned the crowd on the off chance of seeing someone she knew.

她扫视着人群，抱着一线希望看是否有熟人。《牛津词典》