重點講解：
1. at least （數量）至少，不少于；
Every time she travels on the bus it's delayed by at least three hours.
每次她乘公車出行都至少耽擱3個小時K6691x.hOZJSxIk9)G|A。
2. connect to 把…聯系起來；
Dylan's participation in the massacre was impossible for me to accept until I began to connect it to his own death.
直到我將迪倫的死和校園槍擊案聯系起來之前，我無論如何不能接受他參與在其中的事實3]c+cWldkeXqj&rR^I。
3. inject into 添加；注入；
The technique consists of injecting healthy cells into the weakened muscles.
該技術是把健康細胞注射到衰弱的肌肉里面K9-,Qe8GU4|A。
4. up to 高達；多達；
Up to twenty thousand students paid between five and six thousand dollars.
多達20,000名學生支付了5,000到6,000美元(N.2pkfKy_。