Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/9eb1a5b0e005660e29a3345906df53b6.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 forward skating例句_forward skating英汉例句_forward skating双解例句_按摩法牛津词典
It is the scientific basis on air resistence in speed skating, to put forward a theory for teaching and training in speed skating. 對速度滑冰空氣阻力得到的科學依據,爲速度滑冰教學與訓練提供一定的理論基礎。