摘要：
Prof. Pang plays chess against his rival Prof. Shou. They are the only two players in the game. The chessboard is very large and can be viewed as a 2D 阅读全文
摘要：
With the rapid development of society, the demand for high-precision clocks is constantly rising. Recently, the China Clock Production Company is deve 阅读全文
摘要：
While we enjoy chatting with friends on the internet, it is always annoying that we are overwhelmed by lots of messages in various chat groups. A grea 阅读全文