电流概念的形成是电学理论发展中最重要的步骤。
"The task of the poet is to give voice to what is otherwise unspeakable."
最好的想法往往来自倾听那些最接近问题的人。
预测未来的最好方法就是创造它。
A ship in port is safe, but that is not what ships are built for.