hypsokinesis ;
例句:
I bent back too far and hurt my back muscles.
我后仰得太厉害,扭伤了腰部.
Let me tip your head back and wash your hair.
把头向后仰,让我帮你洗头发.
She reached back to give Sam a glass of milk.
她向后仰递给萨姆一杯牛奶.