You've got to pretty much take that chalk, and make a slurry out of it, put water, and dry it back up, put in a mold, and then you can have the chalk again, but you can't just glue it back together.

你得尽可能地收集它的碎片，把它做成粉浆，加水然后风干，放进模具，然后你就能重新得到这支粉笔，但是你不能简单地把它粘起来。

麻省理工公开课 - 热力学与动力学课程节选

So, not at a horribly advanced age, I would like to think, he went to Lyon, which was a capital of the Resistance because they have all these things called traboules in Lyon, was one reason--they're passageways where you'd keep the silk, raw silk dry.

他当时还没到混吃等死的地步,我个人觉得,于是他去了里昂,当时是抵抗组织的一个首都,因为里昂那有那种过道,这是一个原因--就是小胡同,能让丝绸,生丝保持干燥

耶鲁公开课 - 1871年后的法国课程节选