每个季度都要制造新的流感疫苗是因为流感病毒会不断地变化从而逃避宿主(无论是人类、鸟类还是其他动物)免疫防线的攻击。
New flu vaccines need to be made each season because the viruses are constantly changing so as to avoid attack by host immune defences - whether in birds, humans or other animals.
那些在记忆测试中表现良好的人，其体内的免疫球蛋白A水平会升高。免疫球蛋白 A 是一种抗体，是人体抵御细菌的第一道防线。
Those who did well on the memory test had an increase in levels of immunoglobulin A, an antibody that's the body's first line of defense against germs.
这就削弱了免疫系统的下一道称为适应性免疫反应的防线。
This weakens the immune system's next line of defense, known as the adaptive immune response.
这是因为VP 35蛋白干扰了宿主的固有免疫途径——这是抵抗病原的第一道防线，他还说。
This is because the VP35 protein interferes with the host's innate immune pathways that form the first line of defense against pathogens, he said.
免疫健康：免疫系统是由细胞与分子组成的特殊组织，为身体的第一道防线。
Immune Health: the immune system is composed of cells and molecules organised into specialised tissues, which act as the body's first line of defence.
动物肠道免疫系统是动物机体防止感染的第一道防线，也是动物免疫系统的重要组成部分。
Animal gut immunity is the first line to prevent infection, and is the important part of animal immunity system also.
肠道黏膜免疫是动物机体防止感染的第一防线，是整个动物机体免疫系统的重要组成部分。
Intestinal mucosal immune system is the first line of defence that prevents animal body infection. It also is an important composition of whole animal body immune system.
自然杀伤（NK）细胞是天然细胞免疫系统的重要组成部分，是防御病毒感染的第一道防线。
Natural killer (NK) cells are an important component of the innate cellular immune system which provide a first line of defence against viral infections.
血细胞作为免疫防御的第一道防线，在软体动物的非特异性免疫系统中具有重要作用。
Haemocytes, as the frontier line of immune defence, play vital roles in the innate immune system of molluscans.
免疫系统是对付癌症的身体第一道防线。
The immune system is the body's front-line defense against cancer.
天然免疫系统是机体抵御外来病原体的第一道防线，在此基础上衍生出十分复杂的获得性免疫反应。
Innate immune system is the first line of defense of the body against foreign pathogens, which gives birth to a very complex acquired immune response.
自然杀伤(NK)细胞是机体天然免疫的主要免疫细胞，是机体抗肿瘤的第一道防线。
Natural killer (NK) cells is a subset of lymphocytes that mainly participate in innate immunity, and also play a key role in the antitumor immune responses.
中性粒细胞是免疫系统中抵抗有害细菌的第一道防线，并能迁移至感染的组织部位抗击病原体。
They are the immune system's first line of defence against harmful bacteria and migrate into the tissue at the site of infection to combat pathogens.
我们自身的免疫细胞产生大量的次氯酸钠作为杀死入侵微生物第一道防线。
Our own immune cells produce significant amounts of hypochlorite as a first line of defense to kill invading microorganisms.
我们自身的免疫细胞产生大量的次氯酸钠作为杀死入侵微生物第一道防线。
Our own immune cells produce significant amounts of hypochlorite as a first line of defense to kill invading microorganisms.
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