a substance that your body produces in your blood to fight illnesses and infections. Antibodies are an important part of the immune system that protects your body against disease. 抗体
the process of preventing the body's immune system from working, for example so that it does not refuse to accept a new organ after a transplant operation
[U]a situation in which a person or animal that might have a disease is kept separate from other people or animals so that they do not catch the disease 隔离;检疫
in quarantine:
Animals can be kept in quarantine for up to three months. 动物可以被隔离长达3个月。
the natural system that preventsdiseasesspreading from one type of animal or plant to another. This is often referred to in relation to BSE (=a disease of cows)spreading to humans in the form of CJD (=a brain disease in humans). (阻碍疾病传播的)种间屏障(常在谈及疯牛病以克雅病的形式传染人类时用到)