重点讲解：
1. first of all
第一；首先；
eg. First of all, this complex problem that they feel discouraged, but after thinking it over carefully they finally worked out a solution.
起初，这个复杂的问题使他们感到灰心，但经过仔细思考他们终于研究出了解决办法xVKU7p#fV#L&^HkHx。
eg. I was quite surprised first of all and was trying to find out from Ellen for the longest time what this was about.
我首先是很吃惊，在很长一段时间里，我都想从Ellen那里弄清楚这到底是怎么一回事-81cDNf=5-。
2. look back
追忆；回顾；
eg. Looking back, I am staggered how easily it was all arranged.
回头一想，我惊异地发现这一切的安排竟是如此简单mMx,c95C]k。
eg. When I look back now, I realize what a trial I must have been to my friends and relatives.
当我回头看时，我才发现，那段时光对于我的朋友和亲戚们来说是一种考验V^.Gtk5~r.(。
3. leave out
排除；不包括；
eg. Some would question the wisdom of leaving her out of the team.
有人会质疑把她排除在队伍之外是否明智br=qn1knn*Vm1。
eg.If you prefer mild flavours reduce or leave out the chilli.
如果喜欢清淡的口味，可少放或不放辣椒qCVLPwwP+Z[;Gi|vL9。