halfbrother

例句：

1. 1. He has a halfbrother who lives in the same city as him.
   他有一个同父异母的兄弟，和他住在同一个城市。
2. 2. They were both born to different parents, so they are halfbrothers.
   他们出生在不同的父母那里，所以他们是半兄弟。
3. 3. The halfbrother was always looking for ways to get back at his stepfather.
   这个半兄弟总是在寻找机会报复他的继父。