their
determiner
ðə determiner
1 belonging to or connected with people or things that have already been mentioned 他们的; 她们的; 它们的
They washed their faces and went to bed.
他们洗过脸后上床睡觉去了。
The twins spend all their time together.
这对双胞胎总是呆在一起。
People had moved back into their own homes.
人们搬回了自己的家中。
2 used when talking about someone who may be male or female, to avoid saying ‘his or her’ 〔用于谈论性别不详的人,避免使用 his 或 her〕
Everyone is free to express their own opinion.
人人都可以自由表达自己的意见。
Each student will have their own coursework folder.
每个学生都要有自己的课程作业文件夹。