我知道一旦他撞上墙会反弹回赛道，但是我看不到他的车，因为当时他在很边上。
I knew he was going to come back onto the circuit once he hits the wall, but I couldn't see him as he was too much to the side.
墙和地板会帮助你的声音反弹。
The walls, ceiling, and floor also help you voice sound better.
由于职业习惯，丁俊晖走路始终是直线，而且碰到墙以后会反弹，入射角度与出射角度完全相同。
As a habit, Ding Junhui is always walking a straight line, and hit the wall after the rebound, the incident Angle and exit Angle of the same.
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