I was helping my kids with their science project, trying to grow crystals in a jar. We carefully mixed the solution and waited for what felt like forever for the crystals to form. As we were observing the jar, I started thinking about the process of crystal formation and how it's all about finding the right balance of ingredients and conditions. I guess you could say it was a 'gem' of a project!
作者:佚名 · 来源 dadjokewin#179