belonging to or associated with the people or things previously mentioned or easily identified 他们的;她们的;它们的 parents keen to help their children. 热衷于帮助孩子们的父母。 ■belonging to or associated with a person of unspecified sex (指性别不确定的人)他的;她的 she heard someone blow their nose loudly. 她听到有人大声地擤鼻涕。
(Their)used in titles (用于头衔)陛下;殿下;阁下;大人 a double portrait of Their Majesties. 国王和皇后陛下的双人肖像。
语源
Middle English: from Old Norse their(r)a 'of them', genitive plural of the demonstrative sá; related to them and they
用法
2 On the use of their in the singular to mean ‘his or her’, see usage at they