求翻译~~~不要翻译器翻译的~~~请人工翻译~~~今天就要~~~谢谢!

求翻译~~~不要翻译器翻译的~~~请人工翻译~~~今天就要~~~谢谢!
Depression is not a choice. Rather, it is a true medical condition like high blood pressure or heart disease. In the United States alone, more than 17 million people suffer from depression with women being twice as likely as men to suffer from the disease. Depression crosses racial and socioeconomic lines. Anyone can suffer from it, and those that do are not "crazy" or "weak". They have a serious yet highly treatable disease.
Feeling down? You’re not alone. If depression seems pretty common, it is. One in every ten adults suffers from depression. And that’s what has scientists confused. If depression causes harm to the body, why is it so widespread in the population? Some scientists think they may have the answer. Depression may have an evolutionary 进化 benefit. It may improve one’s chances of fighting off infection (感染).
Scientists have known that depressed people show an immunoreactive (免疫反应性的) condition known as inflammation
(炎症), even when they are not infected. For several years they have been finding that genes (基因) linked to depression also affect the function of the immune system. Stress, which can lead to depression, also change the immune system. These findings suggested that depression was somehow linked to the body’s ability to fight disease.
Some scientists now come up with the idea that depression might have had an evolutionary advantage in the days before modern medicine and antibiotics (抗生素) Infection was a major cause of death in early human history. Surviving those infections determined which genes were passed to the next generation.
tiredness leads to inactivity and less social contact which helps keep infection from spreading. Having no appetite helps avoid food sharing which can also spread infection. Sleeplessness, which is associated with both depression and immune system activation, may have been a mechanism to keep a person alert(机警) to fight off enemies after injury.
If scientists are correct about this link, it could lead to new treatments for depression. They are interested in drugs that treat conditions where the immune system attacks the person’s own body, known as auto immune diseases. It is possible that medicine known to treat auto immune disease may be successful in treating depression also.

抑郁症是不是一种选择.相反,它是像高血压或心脏疾病的一个真正的医疗条件.在美国,就有超过1700万人患有抑郁症的妇女的两倍,可能是男性的患有此病.抑郁跨越种族和社会经济线.任何人都可以从它受苦,和那些没有“疯狂”或“弱”.他们有一个严重而高度可以治愈的疾病.
情绪低落?你并不孤单.如果抑郁症似乎是相当常见的,它是.在每十个成年人患有抑郁症.而这正是科学家们一直困惑.如果抑郁造成对身体的危害,为什么在人群中是如此普遍?一些科学家认为他们可能找到了答案.抑郁症可能有一个渐进的进化优势.它可以改善击退感染（感染）.一个人的机会
科学家已经知道,抑郁症患者表现出免疫反应（免疫反应性的）,被称为炎症状态
（炎症）,即使没有感染他们.几年来,他们一直在寻找的基因（基因）与抑郁症也会影响免疫系统的功能.压力,这可能会导致抑郁症,也改变免疫系统.这些结果表明,抑郁症在某种程度上链接到人体抵抗疾病的能力.
一些科学家现在想出了这个想法,忧郁症可能已经现代医学和抗生素（抗生素）感染是一个主要的死亡原因之前,有一个进化上的优势在未来的日子在人类早期历史.幸存确定这些感染的基因传递给下一代.
疲劳导致闲置,减少社会接触,这有助于保持感染扩散.无食欲,有助于避免食物分享也可以传播感染.失眠,这与忧郁和免疫系统的激活有关,可能是一个机制,以保持一个人的警报（机警）伤后击退敌人.
如果科学家是正确的对这个链接,就可能导致新的治疗抑郁症.他们感兴趣的是药物治疗条件下的免疫系统攻击者自己的身体,被称为自身免疫性疾病.这是可能的,医学上称为治疗自身免疫性疾病可能是成功治疗抑郁症也.