Would you please speak slowly?

你能说慢一点吗？

youdao

You can ask the teacher to speak slowly so that you can make sense of what he say.

你可以要求老师讲慢一点，这样你就可以理解他讲的内容了。

youdao

If you speak slowly, I understand.

你说慢了我听得懂。

youdao

Slowly,fewer and fewer young natives learned to speak Hawaiian fluently.

VOA: special.2009.12.02

She told us, through Galletta, that she would speak slowly and take her time.

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That's not to say you have to speak slowly, but think of it this way -- you're aiming to speak more like Brian Williams on the Nightly News then you are like yourself when chatting with your long-lost sister.

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If you are in a large room with 1, 000 people in the audience, you need to speak more slowly than usual, using slightly longer pauses.

FORBES: Consistency Isn't So Foolish -Media Training