storage是什么意思2013浙江高考英语 阅读 B 篇译文

2021年1月7日发(作者：郁倩)
B
Below is a selection from a popular science
以下选自一本著名的科学书籍

book.
If blood is red, why are veins（静脉） blue? 如果血液是红的 ,为什么静脉是蓝色的呢？
Actually, veins are not blue at all.
They are more of a clear, yellowish color.
事实上,静脉根本不是是蓝色的。
它们更像是一种清澈的,偏黄色的一种颜色。
Although blood looks red when it's outside the 尽管血液看上去是红的当它流出身体外后，
body, when it's sitting in the vein near the 但是当它呆在靠近表皮的静脉里时，它更像
surface of the skin, it's more of a dark reddish 是一种红的发紫的颜色。
purple color.
At the right depth, these blood-filled veins 在适当的深度，这些充满血液的静脉比周边
reflect less red light than the surrounding skin, 皮肤显现出浅红色，相比之下，使它们看上
making them look blue by comparison.
brain?
thinking or busy exercising.
去像蓝色。
脑？
动。
Which works harder, you heart or your 那个工作强度更大，你的心脏还是你的大
That kind of depends on whether you're busy 这种就要取决于你是忙于思考还是忙于运
Your heart works up to three times harder 你的心脏工作强度在运动时强度高到3倍以
during exercise, and shifts enough blood over a 上，接着传送足够的血液，终身都在填满一
lifetime to fill a supertanker. 个超级油轮。
But in the long run, your brain probably tips it, 但从长远来看，你的大脑可能会推翻它，因
because even when you're sitting still your 为即使当你静静坐在那，你的大脑仍然正在
brain is using twice as much energy as your 使用比起你心脏多2倍多的能量，它用去4-5
heart, and it takes four to five times as much 倍的血液量来完成。
blood to feed it.
Why do teeth fall out, and why don't they 为什么牙齿会掉，为什么成人长不出牙齿？
grow back in grown-ups?
Baby (or “milk”) teeth do not last long; they 乳牙不会长的太久；它们会脱落下来为了留
fall out to make bigger room for bigger, 下空间给之后的成人的大些，强健些的牙齿。
stronger adult teeth later on.
Adult teeth fall our when they become 成人的牙齿会脱落当它们受到损伤和被细菌
damaged, decayed and infected by bacteria.
you're done.
When they're gone, they are gone. 当它们掉落后，就不会再长出来了。
This is because nature figures you're set for life, 这是因为你自身设定下的自然定数，而控制
and what controls regrowth of your teeth 你牙齿再一次长出的机制也随之关闭。
switches off.
给侵蚀。
Once this second set of teeth has grown in, 一旦第二幅牙长好，你的牙齿也就这么定了。