15. ‘’ Rock music ，‘’ he says ‘’ is really a sociological expression rather than a musical force . ‘’
rather than ： instead of 而不是（肯定前者，否定后者。）
比如：
He is a poet rather than a novelist .与其说他是小说家，不如说他是诗人。
这里介绍另一个短语or rather，意为 more exactly更为确切地说“。
如：
late last night ， or rather early this morning昨天深夜，更为确切地说，是今天清晨。
16. It‘s just that Elvis managed to embody the frustrated teenage spirit of the 1950s .
（1）句中的it有 the reason的意思， that = be cause .
（2）embody ： give a definite form to具体体现
如：
The statue embodies the sentiment of the sculptor .这尊塑像表现了雕像家的感情。
The latest model of the lorry embodies many improvements .卡车的最新式样体现了许多改进的地方。