Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/19e2b82e61062724b0e72331c7b7712a.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 surface friction drag英英字典_surface friction drag剑桥英语解释_surface friction drag柯林斯英文解释_流逝汉英词典
1. N the part of the drag on a body moving through a fluid that is dependent on the nature of the surface of the body 表面摩擦阻力 (Also called skin friction)