死者既已安葬，活著的人就不要長久地哭泣，而應(yīng)該盡快做事，每個人都做自己能做的事，并用來使大家互利。?
The beauty of mathematics is not in its complexity, but in its simplicity and the profound truths it reveals about the universe.
任何實驗的價值和效用都取決于材料是否適合其使用的目的。
Common sense tells us that performance comes and goes, but costs go on forever.