As we age, the lenses of the eyes thicken, and thus refract light differently.
随着我们年龄的增长，眼睛的晶状体变厚，因此对光线的折射也会发生变化。
This is evidence that our immune system really doesn't function so well when we age.
这证明我们的免疫系统在我们衰老时确实不能很好地发挥作用。
It peaks in young adulthood, levels out for a period of time, and then generally starts to slowly decline as we age.
它在青年时期达到顶峰，在一段时间内趋于平稳，然后普遍会开始随着年龄的增长而缓慢下降。
Cognitive decline is the loss of ability to learn new skills, or recall words, names, and faces that is most common as we age.
认知能力下降是指丧失学习新技能或回忆单词、名字和面孔的能力，这是随着年龄的增长而最常见的现象。
The bad news: Our brains do decline as we age.
坏消息是：我们大脑的记忆能力确实随我们的年龄而下降。
This has been linked to increasing forgetfulness as we age.
随着年龄而不断增加的健忘与这些受体息息相关。
How We Age: A Doctor’s Journey into the Heart of Growing Old. By Marc Agronin.
《我们如何变老：一名医生的老年人心理之旅》马克·阿格若宁著
While sleep patterns change as we age, the amount of sleep we need generally does not.
虽然睡眠模式随着年龄改变，但是我们需要睡眠的时间一般不会随着年龄改变。
But despite all our advances, it turns out we age and die at the same rate as other primates.
然而，尽管我们取得了各种各样的进步，我们还是在以和其他灵长类动物一样的速度衰老、死亡。
If we want to be healthy as we age, we have to be the leading scientific country in the world.
如果我们想要在年老时保持身体健康，我们的科技就必须领先全世界。
As we age our metabolic rate naturally slows down, just another joke Mother Nature plays on us.
当我们年长，我们的代谢率会自然地减缓，这是大自然母亲给开我们的另一个玩笑。
Neuroscientists agree that with proper diet, fitness and practice, memory can improve as we age.
神经科学家同意以适当的饮食、健身锻炼、实践记忆可以随着我们的长大而改善。
As we age, we all get this a little bit — but younger men who see it should have their cholesterol tested.
随着我们年龄变大，我们都会多少有点这个环——但如果年轻人有这个的话，就需要查一下自己的胆固醇了。
As we age, we produce less saliva, which washes away bacteria, so teeth and gums are more vulnerable to decay.
随着我们年老，我们分泌更少能冲洗掉细菌的唾液，因此牙齿和牙龈更容易退化。
Sleep patterns change as we age, but disturbed sleep and waking up tired every day are not part of normal aging.
睡眠形式会随着年龄改变，但是每天睡不好、醒来感觉很累可不是正常的老化现象。
AFTER the nagging question of why we are here at all, the one about why we age and die comes a pretty close second.
我们究竟为何来到这世界是个恼人的问题，我们为何变老死亡是紧跟而来的问题。
People over age 50 need extra vitamin D because, for one thing, our skin becomes less able to make vitamin D as we age.
超过五十岁的人需要补充维他命D，因为，一方面，我们的皮肤随着年龄的增长，合成维他命D的能力也慢慢下降。
Additionally, the arousal threshold falls as we age, so that sounds and other interruptions are more likely to awaken us.
另外，随着年龄的增加，半夜惊醒的次数也逐渐增多，声音或其它干扰都很有可能吵醒我们。
In large part, that's because we lose muscle cells as we age. When younger muscle cells get damaged, they're quickly repaired.
在很大程度上，这是因为随着年龄的增长，我们失去不少肌肉细胞。
Furthermore, rather than losing many brain cells as we age, we retain them, and even generate new ones well into middle age.
而且，随着年龄增大，我们并不会损失脑细胞，相反，我们会保留它们甚至在中年阶段产生出新的脑细胞。
We expect the prowess of our joints and lungs to slowly decline as we age, but the thought of our minds doing the same is intolerable.
当我们的年龄变老时，都希望自己的关节和肺部的功能衰退得慢一些，可是我们头脑思维的功能如果也随着年龄一样衰老，那是我们所无法忍受的。
For most of us, our memories fade as we age, and only the occasional song, smell or photo will take us back to a particular time and place.
对我们大多数人来说，除了偶尔被一些特定的歌曲、气味或照片带回某个场景，记忆总会随着年龄增长消退。
Constipation is more likely as we age, as the flow of digestive juices from the stomach, liver, pancreas and small intestine slows down.
随着胃里、肝脏、脾脏和小肠中的消化液流动越来越慢，随着我们年老便秘更易发生。
"Our faces lose tone and definition as we age, " he says. "If you stick to the minimalist routine you used in your 20s, you'll look tired."
“我们的面部皮肤随着年龄的增长而越来越不在状态，”他说，“如果你非得保持你的皮肤像20岁时的样子，那你看起来会很累。”
Understanding the mechanisms in the brain, which affect memory as we age, will help us to find ways to combat conditions linked to memory loss.
清楚大脑的结构机制是随着年龄而不断影响记忆，这将帮助我们记忆流失的情形。
Over time, as we age,the number of mutations begins to outstrip the system’s ability to makerepairs, and mitochondria start malfunctioning and dying.
随着年龄的增长，久而久之，变异的数量逐渐超出了系统修复能力，线粒体开始出现故障进而停止运作。
Nonetheless, because of what happens to our bodies as we age, there are some common elements that all older runners should include in their training.
然而随着年纪的增长，我们的身体会出现各种毛病，这是所有年老的跑步者在训练中都会遇到的问题。
These findings suggest that using spatial memory may increase the function of the hippocampus and increase our quality of life as we age, says Bohbot.
Bohbot说，这些结果表明使用空间记忆等提高海马体的功能从而提高我们年迈后的生活质量。
As we age, cells typically begin to regenerate more slowly and those known as fibroblasts produce less collagen, a protein that keeps skin firm and supple.
胶原蛋白可以保持皮肤紧致圆润。随着年龄增长，细胞更新速度渐缓，成纤维细胞制造的胶原蛋白便逐步减少，来自阳光的紫外线、污染与吸烟等环境因素，则更加速这些变化。
As we age, cells typically begin to regenerate more slowly and those known as fibroblasts produce less collagen, a protein that keeps skin firm and supple.
胶原蛋白可以保持皮肤紧致圆润。随着年龄增长，细胞更新速度渐缓，成纤维细胞制造的胶原蛋白便逐步减少，来自阳光的紫外线、污染与吸烟等环境因素，则更加速这些变化。
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