摘要：
Time limit: 3.000 seconds限时：3.000秒Problem问题In engineering sciences, partial differential equations play an important and central role. For example, the temperature of a metal plate can be expressed as... 阅读全文
摘要：
Problem问题Loglan is a synthetic speakable language designed to test some of the fundamental problems of linguistics, such as the Sapir Whorf hypothesis. It is syntactically unambiguous, culturally neut... 阅读全文