They use these lights for illuminating the playing area. 他们用这些灯给活动区照亮。
The northeast corner of the courtyard is the tigers' living and activity area, via the balusters, tiny blood spots could be found on the ground. 院落的东北角是老虎的住处和活动区,透过栏杆,还可以看到地面上星星点点的血迹。