immune
adj. 免疫的；不受影响的；免除的，豁免的
n. 免疫者，免除者
例句
Adults are often immune to German measles.
成人往往对风疹有免疫力。
《牛津词典》
Our immune systems are killing billions of germs right now.
我们的免疫系统正在杀死数以十亿计的细菌。
His immune system completely broke down and he became very ill.
他的免疫系统彻底崩溃了，他已病入膏肓。
《柯林斯英汉双解大词典》
