hereditary defect

例句：

1. 1. The condition is hereditary, meaning it runs in families.
   这种病是遗传的，意味着它在家族中传承。
2. 2. He has a hereditary heart condition that requires regular check-ups.
   他患有一种遗传性心脏病，需要定期检查。
3. 3. Hereditary diseases can be passed down from parents to their children.
   遗传性疾病可以从父母传给子女。