这个想法来自圣安德鲁斯大学的科学家，他挑战性地要找出火焰里到底是什么。

The idea comes from a St Andrews University scientist challenged to find out just what is inside a flame.

youdao

使他吃惊的是这样一种想法：因为一个人有良好的风度就去抓他，那是什么事情呢？

What arrested him was this reflection: To claw a man because he is good form, what would that be?

youdao

不论那是什么吧，显然它给予了极端强烈的欢乐与痛苦；至少他脸上那悲痛的，而又狂喜的表情使人有这样的想法。

And whatever it was, it communicated, apparently, both pleasure and pain in exquisite extremes: at least the anguished, yet raptured, expression of his countenance suggested that idea.

youdao

And you remember Yeats in "The Second Coming," - there's a beast that's kind of-- He doesn't know what it is, and here he's saying something similar.

你们记得在二次圣临里“,有提到一只野兽-,他不知道那到底是什么，在此他表达相似的想法。

耶鲁公开课 - 现代诗歌课程节选