自动控制的根本问题是在存在干扰的情况下维持期望状态。

数学证明是用逻辑语言写成的诗。

I believe in pink. I believe that laughing is the best calorie burner. I believe in kissing, kissing a lot. I believe in being strong when everything seems to be going wrong. I believe that happy girls are the prettiest girls. I believe that tomorrow is another day and I believe in miracles.

艺术作品是永恒的火花。

我不是一个喜欢回头看的人，我总是向前看。

What good is the warmth of summer, without the cold of winter to give it sweetness.

食欲是最好的调味品。