I don't understand what you're talking about

说什么我看不懂───I don't know what to say;你───you

The article is so poorly-organized that I don't know what to say after reading it.───这篇文章条理不清， 使人看了不知所云。

Well, I don't know what to say.───唔，我不知道该说些什么。

I don't know what to say.───我不知道说什么好。

I don't know what to say! You came here and expect me to give you all my attention for a whole hour. You know I'm busy, so just go!───我真是没话说了！你竟然要我给你一个小时的时间陪你。你知道我很忙，一边去吧！

After we gave him the entire story, he sat there for a moment silently and shook his head slightly, "I don't know what to say. . . "───听我们把事情的来龙去脉说了一遍后，他坐在那儿沉默了好一会儿，微微摇摇头，说：“我真不知该说些什么……”

Avatar jumping flashing, I can 't wait to open, is indeed: he made a sad expression come over, with a sentence: I don't know what to say.───头像跳闪着，我迫不及等的双击打开，等来的确是：他发了个难过的表情过来，附带一句：我不知道说什么了。

I don't know what to say, my head's spinning like a carousel.

I don't know what to say.