After yesterday's slap in the face this may sound like wishful thinking, but sometimes bad turns have positive unintended consequences.

昨天脸上刚挨了一巴掌，现在，这些想法看上去有些一厢情愿，但是有时侯塞翁失马，焉知非福？

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Sometimes food goes bad, but people don't know it, so they eat it anyway and then they get sick.

有时食物变质了人们却不知道，所以还是食用了它，结果就病了。

《柯林斯英汉双解大词典》

But bad things happen to lots of people - sometimes in groups.

但糟糕的事情发生在很多人——有时是一群人——身上。

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Otherwise, it's a pretty bad mistake, but sometimes you do want an infinite loop, Word for instance, Microsoft Word if you use it or pages or the like on your Mac or PC.

否则，它将会是一个错误，但有时你确实需要一个无穷循环，例如微软的,当你在Mac或者PC上使用它时。

哈佛公开课 - 计算机科学课程节选

Sometimes you run into a hot goalie but we had some bad luck sometimes.

BBC: United States ice hockey team stuns hosts Canada

But it has been a tough and sometimes bad-tempered campaign.

BBC: Turkey election: Erdogan's economic trump card

Now it's, it's great that your relations are so good again but do you think sometimes it's rather bad luck on France?

BBC: Breakfast with Frost