a free throw line的用法和样例：
- Any frustration with your inability to get to the free throw line?
- You have to admit the best part of the game was the slam dunk from the free throw line.
- Conley III and Lori Diego Street turns foul, but Alston made one of them a foul, penalty free throw line 3 in 4.
- Man we're shooting threes like they're FTs today.stupid bulls defending the free throw line so well tonight...