ankle drop meaning in English

垂足底
足垂病
踝下垂

Body stretch1 sit on the floor legs straight palms2 on thighs . slowly stretch forward bending at the waist until you can grasp your feet or ankles drop your head as close to your legs as possible . slowly reverse the move till you reach the start position . do two more repetitions
手掌放在大腿上慢慢向前伸，同时弯腰，使手能抓住脚或脚踝低头，使头尽量接近腿部，然后将头与手向后收回原位。