Males that are more susceptible to disease and parasites will have to use their carotenoids to boost their immune systems.
那些更容易感染疾病和寄生虫的男性将不得不使用他们的类胡萝卜素来增强他们的免疫系统。
That rapid replication rate also increased the chances of strains evolving in ways that allowed them to evade hog immune systems.
那样迅速的复制速度也增加了菌株进化的机会，使它们能够用种种方式避开猪的免疫系统。
In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface.
在病毒感染的反应中，老鼠的免疫系统通常会产生抗体，通过与病毒表面的蛋白质结合来破坏病毒。
We have stronger immune systems.
我们有更强的免疫系统。
The toxins can be particularly harmful for people with weakened immune systems.
而这些有毒物质对于免疫系统低下的人可能尤为有害。
Flu typically preys on the old and on those whose immune systems are compromised.
通常，流感波及的对象是老年人和免疫功能低下的人群。
Some argue that the absence of parasites is leading to hypersensitive immune systems.
有些理论认为少了寄生虫的寄生便导致了免疫系统的超敏反应。
In people with healthy immune systems, these symptoms do not last more than about a week.
在具有健康免疫系统的人身上，这些症状的持续不会超过一个星期。
Perhaps this constant moving is stressful for the bees and so depresses their immune systems.
也许持续的迁移对蜜蜂造成压力，抑制了其免疫系统。
But it appears our immune systems decide which antibodies are most important and suppress others.
但似乎免疫系统判断哪些抗体最重要的，并抑制其它抗体。
Scientists found that some people's immune systems could recognise parts but not all of the virus.
科学家发现，一些人的免疫系统只能识别部分病毒，而不是全部。
Sharks have strong, complex immune systems that include an angiogenin inhibitor in their cartilage.
鲨鱼有强壮的，复杂的免疫系统，包括软骨中的血管生长素抑制物。
They would survive if their bodies and immune systems had not been weakened by hunger and malnutrition.
如果他们的体质和免疫系统未因饥饿和营养不足而虚弱，他们本会存活。
The most striking find of the study was that the women often picked the men who had the strongest immune systems.
这项研究最令人注目的地方是女性通常选出来的是那些具有最强免疫系统的男性。
Mercury may have toxic effects on the nervous, digestive and immune systems, and on lungs, kidneys, skin and eyes.
汞可能对神经、消化和免疫系统，以及肺、肾脏、皮肤和眼睛具有毒性作用。
By staying one step ahead of our immune systems, the flu virus can infect large numbers of people year after year.
由于一直领先免疫系统一步，流感病毒每年都可感染大量的人。
Using the patients' existing cells reduced the possibility of their immune systems attacking the manipulated cells.
利用病人现存的细胞来减少免疫系统对经过处理的细胞的攻击。
These are diseases that people with normal immune systems can also get, but with HIV they occur at a much higher rate.
这些疾病也可能发生在免疫系统正常的人身上，但HIV感染者的患病几率要高得多。
Without being exposed to intestinal worms and parasites, as our ancestors were, our immune systems are hypersensitive.
由于没有像我们的祖先一样受到肠道蠕虫和寄生虫的感染，我们的免疫系统变得更加敏感。
However, children, the elderly and those with weakened immune systems are advised against eating lightly-cooked eggs.
但是，不建议孩子，老人以及抵抗力较弱者食用这种微熟的鸡蛋。
A constant low-level stress can leave us feeling exhausted, weaken our immune systems and cause other illnesses such as depression.
持续不断的、低强度压力会让我们觉得筋疲力尽，也会削弱我们的免疫系统，甚至会导致抑郁症等疾病。
It releases adrenaline and can interfere with sleep, increase tension, and decrease the immune systems ability to protect the body.
它会释放肾上腺素，可以干扰睡眠，增强紧张感和降低免疫系统保护人体的能力。
But those hormones could produce heightened levels of inflammation, ultimately leaving their immune systems weakened and vulnerable.
但是这些压力激素会导致高水平的炎症，最终使他们的免疫系统被削弱并变得脆弱。
Kombucha lovers call it a wonder tonic, while some nutrition experts warn that too much can be toxic for people with weak immune systems.
康普茶的钟情者都称它是神奇滋补药，而有些营养专家警告，它对免疫系统衰弱的人来说极可能是有毒性的。
It caused a pandemic — Russian flu — that was largely limited to people younger than 25, whose immune systems had never experienced H1N1.
它引起了俄罗斯流感爆发，患者多限于25岁以下的年轻人，他们的免疫系统从未识别H1N1。
Her team's research suggests that the birds may have evolved to produce higher levels of melanin in order to protect their immune systems.
她的小组研究表明鸟类可能经进化产生较高水平的黑色素，以保护其免疫系统。
A study of urban pigeons in central Paris has shown that birds with higher levels of the dark pigment melanin have stronger immune systems.
一个对巴黎市中心的城市鸽子的研究显示，黑色素水平较高的鸽子有更强的免疫系统。
A new study adds to the growing evidence that fish oil supplements in the diet of pregnant women can bolster their infants' immune systems.
一项新研究提供的新证据表明，在孕妇饮食中添加鱼油能够加强其新生儿的免疫系统。
A new study adds to the growing evidence that fish oil supplements in the diet of pregnant women can bolster their infants' immune systems.
一项新研究提供的新证据表明，在孕妇饮食中添加鱼油能够加强其新生儿的免疫系统。
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