I'm sorry to keep you waiting for so long.
真抱歉让你等了这么长时间。
I'm sorry to have kept you waiting for so long.
对不起让你等了这么长时间。
Oh, I'm so sorry for keeping you waiting for so long.
噢，让你们等这么长时间我很抱歉。
We've been waiting for so long, and at last it comes true!
我们已经等待了很长时间，最后终于成为了现实！
Welcome to Beijing. Nice to meet you. Sorry to keep you waiting for so long.
欢迎来到北京。 很高兴认识您。让您久等了。
He was angry at being kept waiting for so long.
让他等了这么久，他很生气。
He was angry at being kept waiting for so long.
让他等了这么久，他很生气。
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