Sometimes the simplest solutions in chemistry are the most elegant and powerful.

Quality should never be compromised, not even in the face of rising costs.

Change starts with a single step, but it takes a collective effort to make it last.

你太慷慨了，不要跟我开玩笑。如果你的感情仍然和去年四月一样，请立刻告诉我。我的感情和愿望没有改变，但是你的一句话将永远让我对这个问题保持沉默。