【正确答案】：
THERE ARE GENERALLY TWO MAJOR FACTORS THAT CAUSE SEMANTIC CHANGE IN THE LIVING LANGUAGES. ONE IS EXTRA-LINGUISTIC FACTORS（HISTORICAL REASON, CLASS REASON AND PSYCHOLOGICAL REASON）. THE OTHER IS LINGUISTIC FACTORS（SHORTENING, THE INFLUX OF BORROWINGS, AND ANALOGY）.
OR
AS TIME PASSES, CHANGES KEEP TAKING PLACE IN SOCIETY AND OUR DAILY LIFE. NOW, CONCEPTS, IDEAS AND NEW THINGS EMERGE CONTINUOUSLY. MAN HAS COME TO KNOW MORE AND MORE ABOUT THE WORLD AROUND. ALL THIS IS REFLECTED IN LANGUAGE. THE CHANGE OF MEANING MAY ALSO BE CAUSED BY INTERNAL FACTORS WITHIN THE LANGUAGE SYSTEM.
【题目解析】：一般来说，有两个主要因素导致现用语言的语义变化。一是非语言因素（历史原因、阶级原因、心理原因）。另一个是语言因素（缩略法、借词的涌入和类推）。或随着时间的推移，社会和我们的日常生活不断发生变化。现在，概念、思想和新事物不断涌现。人类对世界的了解越来越多。这一切都体现在语言上。意义的变化也可能是语言系统内部因素造成的。