重點講解：
1. what's up
用于口語，親密的朋友間打招呼“怎么樣”“最近過得怎么樣? ”“有什么新消息?”“ 你好嗎?”“怎么了”“發生什么啦”，絕大多數時候這只是相當于“嗨！”，回答也往往只是“Nothing.”（沒什么。）
eg. On the first day of classes at a Los Angeles high school, several American boys came up to a Chinese boy and said: "Hi, what's up? "
一個中國男孩來到洛杉磯讀高中，在上學的第一天，幾個美國男孩走過來向他打招呼：“嗨，你好嗎？”
eg. Hi, what's up? I want to have a perm.
嗨，你好。我想燙個頭發。
2. back-to-back
（勝利等）一個接著一個的，連續的；
eg. Back-to-back defeats made him sad.
連續的失敗使他很傷心。
eg. As it currently stands, the portuguese boss will probably be delighted to take back-to-back championships any way they come.
不管怎么樣，最近葡萄牙人也許會為連續贏得冠軍高興。
3. give up
放棄；
eg. There was no news; nevertheless, she did not give up hope.
沒有任何消息；然而她沒有放棄希望。
eg. How silly it was of you to give up such a good chance!
你放棄如此好的機會是多么的愚蠢呀！