Mr.Smith is the more famous of the two teachers.史密斯先生是两个老师中比较有名的.两者比较用比较级,famous是多音节形容词,在原形前面加more构成比较级.Zhou Jielun is one of the most popular singers in Chin...两个词可以换吗应该可以的，famous注重强调名气，而popular注重强调受欢迎程度，可以互换