向后倾斜
5.Now you are in the neutral position keep your arms comfortably extended, knees flexed (6), back straight and body leaning back to counterbalance the weight of the rig.
6.The forehead slanted quickly back to the hair, which, clipped close, showed every bump of a villainous-looking head.
7.To force exhaled air through a liquid held in the back of the mouth, with the head tilted back, in order to cleanse or medicate the mouth or throat.
10.If the racquet is tilted or laid back at contact you do not get this brushing effect.

