...the insanitary conditions of slums...贫民窟极不卫生的环境a beautiful garden amid the squalor of the slums位于肮脏的贫民窟中的美丽花园As a social worker, she does a lot of work in slums.作为一个社会工作者, 她在贫民区做了大量的工作。Many distinguished men have emer...
辐射产生于电子流的相干运动.The radiation is produced by the coherent motion of electron streams.阻止电子流前进的物质.The material which one is exhibited opposites current follow.导体切割磁场会产生电子流.Electronic currents appear when a conductor cuts mag...