teammate

例句：

1. 1.She was a teammate to the basketball player.
   她曾是篮球运动员的队友。
2. 2. They were teammates during their college years.
   他们在大学时期是队友。
3. 3.He is a good teammate and always helps others.
   他是一个很好的队友，总是帮助别人。