“baby brother”是一个英语短语，意思是 婴儿兄弟或 小弟弟。以下是一些使用“baby brother”的例句：

1. I can remember the precise moment when my daughter came to see me and her new baby brother in hospital.

2. He is my baby brother.

3. It's your baby brother's.

4. We have a new baby. He is a baby boy.

5. My baby brother needs many things: a crib, a cradle, some bottles, and some toys.

希望这些例句能帮助你更好地理解和运用“baby brother”这个短语。