It often happens that a number of applicants with almost identical qualifications and experience all apply for the same position.

经常会发生这样的情况：许多申请者拥有几乎相同的资格和经验，却同时申请同一个职位。

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It often happens that little beginnings have great endings.

微不足道的开端往往会有伟大的结果。

《新英汉大辞典》

It often happens to me.

这样的事情经常发生在我身上。

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We'll talk more about this later, but it often happens that when you change your program to solve one problem you break it, and things that used to work don't work.

我们以后会更多的去讨论者一点，但是经常发生的情况是当你因为,一个问题修改你的程序的时候,你修改了程序,但原来没问题的模块。

麻省理工公开课 - 计算机科学及编程导论课程节选

When it does happen, and it happens too often for my liking, the students just get a zero.

如果真的有人抄袭了，把我惹毛了，我就会给学生打零分。

对于抄袭的想法 - SpeakingMax英语口语达人

Often that signal gets amplified so it can be used, same thing happens inside cells and there's some output that's generated.

通常这些信号要放大后才会产生作用,诱发细胞内发生一些变化,并产生某种输出信号

耶鲁公开课 - 生物医学工程探索课程节选

Here's where it gets interesting: What Libecap found is that while most fields are eventually unitized, it often happens late in their lives.

FORBES: Magazine Article

The National Academy of Sciences needs to investigate right now to what extent this syndrome really exists, how often it happens, and how often cases blamed on baby shaking may actually have other causes.

FORBES: The Dubious Science Of Shaken-Baby Syndrome

"It's the hallmark of immune therapy--it doesn't happen often, but once it happens, those patients live years, " says UCLA oncologist Antoni Ribas.

FORBES: Magazine Article