Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/c908b9a6ec592518b6e8848a22b69800.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 electromagnetic field英英字典_electromagnetic field剑桥英语解释_electromagnetic field柯林斯英文解释_流逝汉英词典
1. N a field of force associated with a moving electric charge equivalent to an electric field and a magnetic field at right angles to each other and to the direction of propagation 电磁场