珀西，拜伦勋爵，约翰·波里·多利和玛丽同父异母的妹妹，克莱尔是当时在场的其他人。

Percy, Lord Byron, John Polidori, and Mary's stepsister, Claire, were the others present.

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玛丽经常被误认为是她的孪生妹妹。

Mary is often mistaken for her twin sister.

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使我惊奇的是，玛丽的男朋友下周将和她的妹妹结婚。

To my surprise, Mary's boyfriend will tie the knot with her sister next week.

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