Huxley speculated that a coat of hair would insulate against loss of body heat and might streamline the body to reduce drag in flight.
赫胥黎推测，一层毛发可以隔离身体热量的流失，并可能使身体呈现流线型，以减少飞行中的阻力。
Nowadays, hair loss is an issue faced by both men and women.
现如今，男性和女性都面临着脱发的问题。
Older men spend a lot of money trying to avoid hair loss.
年龄大些的男人花很多钱来避免脱发。
Major stress like surgery or cancer could result in hair loss, but this is usually temporary and the hair will likely regrow without treatment once the stress has passed.
像手术和癌症的重压可以导致脱发，但是这只不过是暂时的，你的头发在这种治疗上的压力过去后又可以重新长出来。
It is caused by chronic pulling of the hair, leading to gradual hair loss, mostly at the hairline.
这是由于长期的拉紧头发，会导致头发逐渐脱落，尤其是在发际线处。
With unexplained hair loss, there’s not one trigger for every person and there’s not one treatment for every person.
对于无法解释的头发缺失，没有一种起因可以归因于每个人，也没有那么一种治疗方法适合每个人。
If you're unhappy with how hair loss makes you look, treatment may boost your self-esteem.
如果掉发令你对自己的外观不满意，治疗可能可以提高你的自尊心。
Shampoos and other products designed to open scalp pores do not stop hair loss or promote regrowth of hair.
洗发香波和其他可以打开毛孔的产品并不能阻止头发脱落，也不能促进头发的再次长出。
When you're pregnant, your hair stays in a high state of hair growth, with only minimal hair loss.
当你怀孕后，你的头发会保持高增长的状态，只有很少的头发会脱落。
Also try to limit stress in your life, one of the main causes of hair loss.
另外请尽力减轻生活压力，因为那是掉发的主要原因之一。
Intriguingly, new hair regrowth was initiated a few days later but was followed by renewed hair loss.
有趣的是，新的毛发几天之后就开始生长了，但是新一轮的毛发丢失又开始了。
Although a number of infections can lead to hair loss, the most common infection that affects the scalp and hair is ringworm.
虽然很多感染都会导致脱发，但是影响头皮和头发最常见的感染是癣。
Poor nutrition causes hair loss. - Healthy, well-nourished people still lose their hair and taking nutritional supplements will not regrow hair.
营养缺乏导致脱发——健康，营养状况很好的人们也依然在脱落头发，补充营养也不能使头发再次生长。
If you're fighting hair loss, chances are you've heard - and possibly tried - every gimmick out there.
如果你正在与脱发做斗争，那么你或许听过“机会来了”-或者你也尝试了-但是总是不管用。
Have you noticed more hair loss during an especially stressful time?
不知你是否留意到在压力大时你的头发掉得比平时多呢？
Here are the top 10 causes of hair loss.
以下是引起脱发的10大原因。
Hair loss that runs in the family can be treated with medicines or with surgery, such as a hair transplant.
治疗遗传性脱发可以服用药物或进行手术，比如头发移植。
When your hair loss is inherited, your hair won't grow back naturally.
遗传性脱发导致的掉发不会自然地重新长出。
Your symptoms will depend on what kind of hair loss you have.
不同类型的掉发有不同的症状。
The painful truth is most guys have noticeably thinner hair by age 35 and significant hair loss by age 50.
男人到了35岁就会发现自己的头发变得越来越稀薄，到了50岁，头发就几乎快掉光了，这是一个多么令人痛苦的事实。
And after doctors visits, surgery, chemo, hair loss, pain.
之后，去拜访了外科医生，进行化疗，开始脱发，伴随着疼痛。
Probably the most common deficiency thought to contribute to hair loss is iron.
头发脱落通常是由于缺铁引起的。
Stress causes hair loss. - Day-to-day stress does not result in hair loss, no matter how much you fight with your mate or how loudly your boss yells at you.
压力导致脱发——日常的压力并不是导致脱发的原因，不论是你与老伴吵多少次架或者你的老板又对你多么大声的吼叫。
This type of hair loss does not represent typical male baldness, but it does require a diagnosis.
这些类型的脱发都不能代表典型的男性光秃，但是它需要去诊治。
Vomiting and hair loss occur at 70 rem and 75 rem respectively, while exposure to 400 rem can mean possible death in two months.
70雷姆和75雷姆的辐射量分别会导致呕吐和脱发，而400雷姆的辐射量可能导致人在两个月内死亡。
I'll never know for sure, because both stress and certain antidepressants can cause hair loss.
我无法知道确切的原因。因为压力和某些抗抑郁药物均可能引起脱发。
掉发是如何诊断的？
Despite all the different causes of hair loss, the leading cause is one that we can't do much about.
尽管引起脱发的原因各不相同，但最主要的原因却是一个我们无法控制的因素。
Poor circulation causes hair loss. - Research shows that medications that increase blood flow to the scalp do not grow hair.
血液循环贫乏导致脱发——研究人员发现增加血液循环的药物并不能使光秃的头皮长出秀发。
Whether it’s because of a crash diet, general malnutrition or some genetic or biological defect, deficiencies in certain nutrients can cause hair loss.
无论是由于快速节食，营养不均衡还是一些遗传的或生理缺陷引起的某些营养物不足，均会导致脱发。
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