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...
学校不会接受任何学生质量不合格的作业。A school would not accept low-quality work from any student.鲍勃体检不合格。Bob failed his physical.他的表演不合格。His performance was not up to par....