goal area line的用法和样例：
- When Lack of Progress is called, any robots sitting behind the goal line will be moved forward out of the in goal area.
- This introductory text is displayed at the beginning of a goal area side pane.
- Temple area lined Biri, water Chan Chan.
- Court players isn't allowed to enter the goal area unless they are in the air to shoot the goal.
- The default Project Guide behavior is to perform fairly simple goal area changes, based on the view type.