自然的动作 meaning in English

natural manner

Frankie liked to say that boxing was an unnatural act ,
弗兰基总喜欢说拳击是一种不自然的动作
This is a natural motion and produces topspin on their shots
这是一个自然的动作，并且能够在他们的回球上生产上旋。
A flexible joint is one in which the muscles and connective tissues surrounding it do not restrict the natural range of movement
所谓灵活的关节，是指关节周围的肌肉及结缔组织不会限制自然的动作幅度。