(一):I'd like to summarize the main points.

我想把要点总结一下。

I'd like to summarize the main points.
我想把要点总结一下。
We are all ears.
我们洗耳恭听。
Please allow me to give a conclusion.
请允许我做一个的总结。
Before I finish, I'd like to run through the main points again.
在结束之前我要将要点再总结一下。

(二):I declare the meeting closed.

我宣布会议结束。

I declare the meeting closed.
我宣布会议结束。
Thank you for your wonderful hosting,
谢谢您的主持，非常精彩。
This concludes the first part of the conference.
会议的第一部分到此结束了。
I'd like to conclude today's program.
今天的会议到此结束。
If nobody wants to add anything, we can draw the meeting to a close.
如果没有人有其他意见的话，会议就到此结束。
You're dismissed!
散会！