重点讲解：
1. first class
头等的；一等的；
eg. He won himself two first-class tickets to fly to Dublin.
他为自己赢得了两张飞往都柏林的头等舱机票。
eg. He paid for and was assigned a cabin in first class.
他付完钱后被安排到了头等舱。
2. chicken-shit
胆小鬼；
eg. Winning any other way is chicken-shit.
以其他任何方式取得胜利的都是懦夫。
eg. Don't be such a chicken shit. Go ask her to dance.
别像个胆小鬼似的，去邀请她跳舞吧。
3. You bet.
口语常用；表示“是的，没错，完全正确”；
eg. 'It's settled, then?' — 'You bet.'
“那么，就这么定了？”——“定了。”
eg. Whatever i ask you have to answer 'you bet'.
不管我问什么，你都必须回答“没错” 。
4. buck for
努力争取；
eg. She is bucking for a promotion.
她正在努力争取升职。
eg. Item twenty-six any work done by any member of the association is volunteer, and no one should buck for his own interests.
第二十六条本单位所有人员的工作都是无偿的，不谋求任何个人的利益。