“他们的”的英语可以翻译为：their，theirs ...

他正挥手以引起他们的注意。He was waving his arms to draw their attention.学院的老师们抱怨说他们的学生还很不适应大学的课业。Faculty members complain that their students are unprepared to do college-level work.马克走在前面，听不见他们的声音。Mark was out of earshot, walking a...