英语科普阅读材料双语——科技4篇
（一）我们如何在28小时内到达火星？
How Could We Get To Mars In Only 28 Hours?
Everyone always wants to get to Mars.
每个人都总是渴望去火星
Unfortunately, the journey would be a long one,
不幸的是 依靠我们目前的技术
taking hundreds of days of travel with our current technology.
这趟旅途将会十分漫长 长达几百天
Well, what if we could shorten that time to only a matter of days
试想 如果我们不使用宇宙飞船
by throwing away our spaceships
而是用一些在太空中急速穿梭的东西
and using something that’s already zooming across space?
这趟旅程可以缩短到几天？
I’m talking about comets.
我说的是彗星
Comets are big ol’ cosmic snowballs,
彗星是一个由冻结气体 岩石和尘埃
made from frozen gases, rock, and dust
组成的巨大雪球
that end up orbiting the Sun after the other planets
当其他行星试图把彗星扔向地球
tried throwing them at Earth and missed.
但没成功时 它们便围绕地球飞行
Well, that last part probably isn’t true.
当然 最后那部分可能是假的
Everyone knows that the planets only have water gun battles.
我们都知道 行星上只有水之战
Not to mention, comets can actually be pretty big.
更不必说 彗星实际上可能非常大
Frozen, you could probably liken them to about the size of a small town.
这些雪球 你可以把它们比做一个小镇那么大
However, when these things get close to the Sun in their orbit,
然而 它们在自己的轨道环形并接近太阳时
they can begin to heat up.
会逐渐变热
Then they start spewing dust and gases,
接着喷涌出尘埃和气体
forming a giant glowing head.
形成一个巨大的发光脑袋
Huh. I thought only I had that problem.
哈 我认为只有我有这个顾虑
Luckily enough, if we want to use one of these things for stellar travel,
幸运的是 如果我们想用其中一个彗星进行星际旅行
gassywe have quite a few to choose from!
我们的选择有很多！
According to NASA,
根据美国航天局
there are around 3,600 comets that we currently know of.
我们目前已知的彗星约有3600颗
Beyond that, it’s believed that there are billions of other comets out there
此外 据说在遥远的柯伊伯带还有数十亿颗彗星
orbiting our Sun in the Kuiper Belt and even more distant Oort Cloud.
甚至是更远的奥尔特云 围绕着太阳运行的
What makes comets great for getting around in space
彗星能够穿梭星际
is that they can go SUPER fast.
是因为其速度极快
Yeah, this baby can fly!
是的 这小东西会飞！
How fast they’re travelling depends on a bunch of different factors,
它们的速度取决于多种不同因素
but they can travel anywhere from a few thousand kilometers per hour,
但在一定条件下 它们的速度可以从时速几千公里
to over 160,000 kilometers per hour under certain conditions.
达到每小时超16万公里在任何地方飞行
In fact, in 2016, scientists at NASA recorded
2016年 美国航天局的科学家们记录了
a comet traveling at nearly 600 kilometers per second as it dove toward the Sun.
一颗秒速六百公里驶向太阳的彗星
That’s over 2 /million/ kilometers per hour!
那超过了两百万公里每小时！
To put that in perspective,
就此展望
if we could travel at 2 million kilometers per hour,
如果我们能以每小时两百万公里的速度飞行

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