The mechanics teaching material usually when involves the projectile motion the discussion is neglects the air drag, but the movement object must receive the air drag in the air the function.是什么意思_The mechanics teaching material usually when involves the projectile motion the discussion is neglects the air drag, but the movement object must receive the air drag in the air the function.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句