I'd like to end by emphasizing the main points.
我想最后强调几个要点.
I'll give you a brief summary.
我给你们简单总结下.
Did you have anything to add?
你还有什么要补充的吗?
That's all there is to it.
没什么可讲的了.
Let's summarize...
我们总结一下......
I'd like to conclude with one last point.
我想最后再讲一点.
Just to reemphasize, let me remind you...
只是为了再2强调一下,我提醒你们...
Lastly...
最后......