You owe a certain person a sum of money.

你欠着某人一笔钱。

《柯林斯英汉双解大词典》

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In an interview via Skype, Tom Perls said the same technique used to predict long life may also be used to predict whether a person might eventually develop certain diseases.

VOA: standard.2010.07.14

A person is a body that has a certain set of abilities, can do a certain array of activities.

人是拥有一套特定能力的肉体,可以从事一系列特定的活动

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He would study some person from a certain point of view.

他会从某个角度去审视一个人。

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In addition, it takes into account how a person will react to a certain person.

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You are then told all these problems can be resolved if you sell your business to a certain person at the right price.

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"There is a certain person who's coming that's intimately associated with getting the production on in the first place - our friend Bob from Los Angeles, " May confirmed.

BBC: Freddie Mercury