One year later, they began to sing happy songs in the cage. It seemed that they'd grown used to this artificial surrounding.

一年以后，它们对这个人工环境已经习惯，它们在笼子里歌唱着，显得很高兴。

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We all crowded into her office to sing 'Happy Birthday'.

我们全都涌进她的办公室，唱“祝你生日快乐”。

《牛津词典》

How do you react when people sing "Happy Birthday" to you in a restaurant?

如果人们在餐馆里为你高唱“生日快乐”，你将如何反应？

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Free conference call services mean your entire clan can sing happy birthday to you at the same time.

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When we're done, before I leave, we're going to sing happy birthday, okay?

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That means you should stand there at the sink for as long as it takes to sing happy birthday twice.

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