重點講解：
1. take off (產品、活動、事業等)騰飛，突然成功；
例句：I think boxing will take off in a big way here.
我想拳擊運動在這兒會有很大的發展tW8|PMa(b!ias。
2. show up 出現；
例句：When he eventually did show up, it was obvious to all that he had changed his original idea.
當他最終出現時，所有人都清楚他已經改變了他最初的想法D|ATjx+47fLMl。
3. at the expense of 以犧牲…的利益為代價；
例句：The dealers profited shamefully at the expense of my family.
這些經銷商通過損害我家人的利益不光彩地賺錢pj;mxZuuTHc*kCyzb。
4. add up 加；增加；
例句：Add up all the income you've received over the period in question.
把那個時期里你拿到的所有收入加在一起OgKAv,hb1ja.。