A vaccine may also give us passive immunity by providing B cells taken from an animal or a human to play the same role.

疫苗也可以通过提供取自动物或人身上的B细胞来发挥同样的作用，从而使我们获得被动免疫。

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But when they were not told the outcome of the first gamble (situation a or b), only 36 per cent wanted to play again.

而不告诉第一局结果的人(情况A或B)，只有36%的人会继续玩下去。

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There is some evidence that B vitamins may play a role.

有一些证据可以说明维生素b难逃干系。

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Please choose a rhythm for excerpt one you can choose rhythm A which is or you could choose rhythm B So I'm about to play a piece. It's by Chopin.

请选一个和你听到的相符的节奏,你可以选节奏甲,也可以选节奏乙,我现在要弹一段,肖邦的曲子

耶鲁公开课 - 聆听音乐课程节选

Yes, that is a play-off of Notorious B.

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B-cells play a critical role in keeping the immune system healthy.

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He also talked about his next role where he is due to play US President Lyndon B Johnson in a film called The Butler.

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