刀能杀人,人尽知之;笔能杀人,人则未尽知也。
【释义】刀能杀人,人们都知道;笔能杀人,人们却未必都知道。
化学的进步以新元素的发现和分析方法的改进为标志。
Technology must serve both the industry and the environment—there is no other way.
"The only thing we have to decide is what to do with the time that is given us."