实现明天的唯一限制是我们今天的疑虑。
The surface of a painting is a battlefield where all the problems of painting are fought out.
善良是一种聋人能听见、盲人能看见的语言。
系统设计的未来在于将形式化方法与传统工程实践相结合。
It is best to act with confidence, no matter how little right you have to it.