In United states, only five percent wait that long.

在美国，只有五分之一的病人需等待。

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And if you wait too long, maybe I'll be somewhere else designing too.

如果你很久都不来美国，我可能已经到别的地方去做设计了。

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How long did you wait for me?

你等了我多久？

How long实战 - SpeakingMax英语口语达人