(一):What is it that you want to say?

您想说什么？

What is it that you want to say?
您想说什么？
At a word, the cost is too high.
简而言之，成本太高。

What do you mean by...?

Could you explain what you mean by that?

(二):If you dorfl nnfnd, we'll leave questions to the end.

如果您不介意，我们将把提问放在最后。

If you don’t mind, we’ll leave questions to the end.
如果您不介意，我们将把提问放在最后。
There's no problem.
没问题。
Now it’s time for today’s question.
现在是今天的提问时间。
There will be a few minutes for questions.
将会有几分钟的提问时间。