当我不会演戏时,我被要求去演戏。当我不会唱歌时,我被要求唱
The key to a successful database system is its ability to evolve with the changing needs of its users.
心理生活是一个整体这一普遍说法可以被接受为真,但它并没有太大帮助。
In mathematics, the art of proposing a question must be held of higher value than solving it.