重点讲解：
1. per se
本身；本质上
eg. The authors' argument is not with the free market per se but with the western society in which it works.
作者的论点与自由市场本身无关，而是与自由市场所处的西方社会有关。
eg. Global warming per se is not really the problem; the catastrophic climate changes which might be caused by it are.
全球变暖本身并不是真正的问题；可能由它引发的灾害性天气变化才是问题所在。
2. on the air
播送（广播、电视节目）；（广播、电视节目）播放；
eg. She is going on the air as presenter of a new show.
她即将上电视主持一档新节目。
eg. Rockwell hopes the program can be on the air within a year.
罗克韦尔希望该节目能在一年内播出。
3. a bunch of
大量；大批；
eg. We did a bunch of songs together.
我们一起唱了很多首歌。
eg. Your friends are all just a bunch of nobodies.
你的朋友都不过是无名之辈。
