They would put a mark on it so they would know their family's bread and leave it with the baker.

VOA: standard.2010.07.16

So if we want to put that in chemical terms, we want to make sure we put these in brackets here, and remember, this is the resonance arrow, it's not a reaction arrow, it's a resonance arrow, so make sure you mark it up correctly like that.

那么如果我们把它类比到化学中来，我们要确保它们都放在括号里，而且要记住，这是一个表示共振态的箭头，而不是表示化学反应的，它是一个表示共振态的箭头，因此请务必像这样正确地标记它。

麻省理工公开课 - 化学原理课程节选

And the butterfly does appear in just one moment, and it's during the tennis scene. As Humbert and Lolita play, there is one butterfly that flits between them. It's a mark of their equality as artists in that moment.

那蝴蝶曾经在短短的一瞬出现过，那是,在那个打网球的场景里，当亨伯特和洛丽塔打球的时候，一只,蝴蝶从他们中间飞过，它标志着他们在那个时刻是艺术家。

耶鲁公开课 - 1945年后的美国小说课程节选

I think it's a remarkable dynamic that Mark started this company in 2004 and that first generation the first nine or ten years of the Internet did not have a Facebook-like company that was thinking through it in a simple way.

我认为马克在2004年开办的这个公司的影响巨大,因为互联网初期的那代人用了九、十年,都没能创办一家像脸谱网一样的公司,能用简单的思维考虑问题。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选