Addtion. This is a movement term that refers to any (motion) of an extremity that is moving toward the body. It can be an arm or a leg in humans.
Extremity 手足 四肢
内收 ☞ 这是运动术语,它是指肢体向身体移动的任何动作。它可以是人类的手臂和大腿。
Abduction. This is a movement term that refers to any movement of an extremity away from the body. It can also be an arm or a leg in humans.
外展 ☞ 这是运动术语,它是指 肢体远离身体的任何运动。它可以是人类的手臂和大腿。
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