Frame #6: The vigor of the right arm pull is evidenced by the amount of upper arm adduction that has occurred since the previous frame.
Frame #6: The vigor of the right arm pull is evidenced by the amount of upper arm adduction that has occurred since the previous frame.
画面6：从上帧画面开始的上臂内收继续加大，这也使得右臂的划水力增大。