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....
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...