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used when referring to people, animals or things as the object of a verb or preposition, or after the verb be 他们;她们;它们 -
used instead of him or her to refer to a person whose sex is not mentioned or not known (指性别不详的人时,用以代替 him 或 her)
Word OriginMiddle English: from Old Norse theim ‘to those, to them’, dative plural of sá; related to their and them.