The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.
诗歌是灵魂的音乐,尤其是伟大而有感情的灵魂的音乐。
The artist must be a philosopher and a poet.
A lady's imagination is very rapid; it jumps from admiration to love, from love to matrimony in a moment.