I can't help but I feel I need to ask you this question.

我觉得很有必要问您一个问题。

普林斯顿公开课 - 国际座谈会课程节选

You use "I can't help but" when you feel helpless, when you want to get something across that needs to happen.

当你觉得无助时，或者当你说明需要做到这件事情的时候，你就可以使用“I can't help but”句型。

I can't help but 课堂 - SpeakingMax英语口语达人

So, also about Max Born, just to give you a little bit of a trivial pursuit type knowledge, he not only gave us this relationship between wave function squared, This is her grandfather, I don't know if you can see from the eyes, I feel like there's a little bit of a resemblance there.

这里有些，关于它的，花边新闻,他不仅带给我们，这个波函数平方的关系,还给我们带来了，他是她的外祖父，我不知道,你们能不能看出来，我觉得,他们眼睛长得很像。

麻省理工公开课 - 化学原理课程节选

And these aren't necessarily so incompatible but the evolutionary perspective I think would argue that you can feel that kind of love for more than one person or at least it would facilitate the passing on of your genetic material to a larger array of the next generation.

两种观点不太相容,但是持进化论观点的人认为,你可以和两个以上的人拥有完美式的爱情,至少会促进,你的基因传给更多下一代的人。

耶鲁公开课 - 心理学导论课程节选