Examples
TomTomhé和MaryMarydōu都shì是dú shēng zǐ nǚ独生子女。
Tom和Mary都是独生子女。
Tom and Mary are both only children.
“你有没有兄弟姐妹？”“没有，我是个独生子女。”
"Do you have any siblings?" "No, I'm an only child."
因为现在上海家家都是独生子女，家长对小孩的读书非常重视。
Because families in Shanghai today have only one son or daughter, the head of the family places a strong emphasis on their child's studying.