重点讲解：
1. first of all
第一；首先；
eg. First of all she just smiled, then she started to laugh.
最初她只是微笑，后来才放声大笑Dq4dF8S6*9。
eg. First of all, you should know what profession suits you.
首先，你该知道什么职业适合你QgmTymfysCI0e。
eg. Well, first of all we can't possibly spare the time.
你看，最主要的是我们实在抽不出时间GnU;fh.X-=a-=Twl*。
2. let's see
口语常用，（表示试图记起某事或找到某物）让我想一想，让我看看；
eg. Let's see, they're six — no, make that five hours ahead of us.
让我想一想，他们比我们早 6 个——不，就算是早 5 个小时完成NRA1E[O3W8z7F。
eg. Oh, let's see. It'll be about 3:30 before we have anybody free.
哦，让 我 想想D!DQEY!CglV,JOC;。大概要到3:30我们才有空T-2%1_IX8d7D。
eg. Let's see, our flight number is CX360 monitor says our flight is on time.
让我看看，我们的航班号是CX360，显示屏上显示我们的航班准时到了F6U8692,r6wy*16ind,。