By using the laser-electronic timing method,the auther of this paper measured the rotating speed of the knen joints and the running speed of the sprint,and also studied the correlation between them.是什么意思_By using the laser-electronic timing method,the auther of this paper measured the rotating speed of the knen joints and the running speed of the sprint,and also studied the correlation between them.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句