So if we have a negative change in energy for any reaction as it's written, what that actually means is we're giving off energy as the reaction proceeds.

如果我们像这里写的这样,在任何一个反应过后，得，到的能量变化为负值,这就意味着我们在这个过程中放出了能量。

麻省理工公开课 - 化学原理课程节选

When the bombs went off in London last year, I thought about Yeats and what he might have thought or written about this.

去年伦敦爆炸案发生时，我想到了叶芝,我想象他会想些什么,他会为此写些什么。

耶鲁公开课 - 现代诗歌课程节选