Could you wait a moment , please?

请您稍等一下，好吗？

《牛津词典》

If you can wait a moment, I'll sort it all out for you.

要是你能等一会儿，我就可以把什么都给你弄好。

《牛津词典》

Wait a moment [while], will you?

等一会儿好吗？

《新英汉大辞典》

But if I have not convinced you, please wait a moment before getting on the phone to Portugal to order your T-shirts.

BBC: Bruce Forsyth in 1971

But wait a moment.

ECONOMIST: A country's welcome rise

They were obviously written as an ode to her success on the Pop Idol show: "Some people wait a lifetime for a moment like this - I can't believe it's happening to me".

BBC: US Idol's pass�� pop