重点讲解：
1. first of all
首先，第一；
eg. First of all, you should know what profession suits you.
首先，你该知道什么职业适合你Zmhm_UrRQv3.a+RBZ3。
eg. First of all, to try to keep calm at the interview.
首先，面试时要保持镇静yyIVrtk5%#3。
2. at the same time
同时；
eg. These troubles came along all at the same time that I was at a loss.
这些麻烦突然一起发生，使我不知所措iFpWn*-f5tVOO。
eg. They learn and work at the same time.
他们一边工作一边学习#98o1|8Dj#sA8。
3. look up
（在参考书、列表等中）查检（事实或信息）；
eg. I looked your address up in the personnel file.
我在人事档案里找到了你的地址J09zi,o-K,!Ue。
eg. Many people have to look up the meaning of this word in the dictionary.
这个词的意思很多人都要查字典才知道(HP8NFLco.。