| 例句 |
The immune system is our body's shield against infection.免疫系统是我们人体抵抗感染的盾牌。The virus affects the body's immune system so that it cannot fight infection.这种病毒会影响身体的免疫系统，使身体不能抵抗感染。Immunization gives people the ability to resist infection temporarily or permanently.免疫接种可让人可以永久或暂时地抵抗感染。 |