详细解释:n. 手掌向下
【医】 旋前, 伏卧, 俯卧
英语解释：
名词 pronation:
rotation of the hands and forearms so that the palms face downward详细解释：
pro.na.tion
n.（名词）The act of pronating.内旋：内旋的动作The condition of being pronated, especially the condition of having flat feet.向后转动：内旋后的状态，尤指平足的状态