注意,这些本征值并不是等距离分布的.Notice that the energy eigenvalues are not equally spaced.为此目的,我们将首先考虑下列的本征值问题.To this end we shall first consider the following eigenvalue problem.总可以做到使得简并的本征函数是正交的.It can always be arranged that dege...
Crosswalks coat of paint to encourage walking and biking.过街天桥上都挂上鼓励步行和骑车的条幅.Represents the intersection of two small roads with crosswalks.表示带人行横道的两条小路的交叉路口.Many pedestrians cross the road recklessly instead of using cro...
Failure is never quite so frightening as regret do.比失败更令人恐惧的是懊悔。Success is not final, failure is not fatal: it is the courage to continue that counts.--Winston Churchill成功不是终点，失败也并非末日，最重要的是继续前进的勇气。It is the easy way out ...