系统的稳定性取决于开环传递函数在复平面上的行为。

The poet is the only one for whom the world is not silent; he is the only one who can hear the music of the spheres.

在更有价值的人力和非人力资源的生产中，思想是关键投入。

"Celebrity is a mask that eats into the face."

银行业最重要的是保持公众信任。