Relative immunity to severe infection by a particular pathogen as a result of a chronic low-grade infection induced earlier by the same pathogen.
传染免疫由以前同一病原体所引起的慢性低度传染而造成的特定病原体对严重感染的相对免疫
Inherited, acquired, or induced resistance to infection by a specific pathogen.
免疫力遗传的、后天的或诱发的对特定的病原感染的抵抗能力
An object that is surrounded by a magnetic field and that has the property, either natural or induced, of attracting iron or steel.
磁体处于磁场包围中的一个物体，具有天生的或者是引发的吸引铁或钢的特性
