blood relative

例句：

1. 1. She was shocked tolearn that her biological mother was a bloodrelative.
   她得知自己的生物学母亲是直系亲属时感到震惊。
2. 2. Thefamily had many blood relativesliving in different parts of theworld.
   这个家庭有许多居住在世界各地的直系亲属。
3. 3. He is a blood relative ofthe president's daughter.
   他是总统女儿的直系亲属。