The instructor made him shake his head, swing his arms, stretch his neck and bend his knees.
教练让他摇头，摆动手臂，伸展脖子，弯曲膝盖。
2
Southbank, at an eastern bend in the Thames, is the center of British skateboarding, where the continuous crashing of skateboards left your head ringing.
位于泰晤士河东部的一个转弯处的南岸，是英国滑板运动的中心，在这里，滑板不断的撞击让你的头嗡嗡作响。
3
As you deepen the bend of the knees, maintain a straight line from the top of your head to your tailbone.