奈奎斯特准则提供了一种图形方法来确定闭环系统的稳定性。

A vision without action is merely a dream.

Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.

海洋渔业是蓝色经济的重要组成部分，我们要在保护中开发，在开发中保护。