12. Horwitz sees the rock music arena as a sort of debating forum ， a place where ideas clash and crash .
（1）see …… as …… ： consider …… as ……把……看作……
（2）forum ： a meeting place of discussion of matters of public interest论坛。
（3）a place 是a sort of debating forum的同位语，后面由 where引导的句子是定语从句，修饰 a place.
‘’ ideas chash and crash ‘’意为“各种思想冲撞”。
13. ‘’ The redefinition ， ‘’ Horowitz says ‘’ is a task uniquely performed by the young……‘’
‘’ uniquely performed by the young ‘’ 是过去分词短语，用于修饰前面的‘’a task‘’。
14. It is they alone who combine invention and exaggeration ， ……
（1）it is …… who （ that ） 是强调句式。
（2）alone ： （ after a noun or pronoun ） only（在名词或代词后面）仅，只。
His name alone was enough to draw a large audience .仅仅他的名字就足以吸引一大批观众。