重点讲解：
1. no matter 不管…；无论…；
No matter how well you know Paris, it is easy to get lost.
不管你对巴黎多么熟悉，也很容易迷路#L*cGl([4pwz7CdC=v。
2. at the same time 同时；
It's impossible to get everybody together at the same time.
让所有人同时聚在一起是不可能的+~nsFWhy6GZD5SI_Yo。
3. for the first time 第一次；
Naturally, you were keyed up when you went on the platform for the first time.
你第一次登上讲台感到紧张是很自然的Wxy-L.E^)JTh|6c.。
4. be happy to do sth. 乐意的；情愿的；
I'll be happy to answer any questions if there are any.
如果有问题，我很乐意回答VTlRzUq5*nY34lvI。