they的形容词性物主代词和名词性物主代词和反身代词

This charity aims to help people help themselves.

这个慈善机构的.宗旨是帮助人们自力更生。

Parents should involve themselves in their child's education.

父母应当参与孩子的教育。

Theirs are the children with very fair hair.

他们的孩子是那些长着满头金发的。

Theirs had been a happy and satisfactory marriage.

他们的婚姻曾经一直幸福美满。

Their family has always been well thought of around here.

他们家在这一带一直颇受敬重。

It was time to put their suggestion into practice.

那时就该把他们的建议付诸实施了。