在重新进入大气层的过程中，大部分航天器会在穿过地球大气层时燃烧殆尽。
During re-entry, most of the spacecraft will burn up while passing through the Earth's atmosphere.
来自外太空的各种宇宙射线通过空气进入大气层，但来自太阳的大量辐射却被屏蔽了。
Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are screened off.
由于卫星高度较低，碎片几乎直接进入大气层。
Because of the satellite's relatively low altitude, debris began re-entering the atmosphere almost straight away, the us defence department said.
当阳光进入大气层，有点轻微的弯曲。
我们知道如何让飞机进入大气层并以高超音速飞行。
We know how to insert the aircraft into atmospheric hypersonic flight.
流星是唯一可以这么快进入大气层落地的。
The only things that reenter this fast and touch down are meteors.
其二，能够阻止甲烷(一种强效温室气体)进入大气层。
As well as yielding energy, it also prevents what is a potent greenhouse gas from being released into the atmosphere.
当流星体进入大气层，它压缩的空气在前面的。
When a meteoroid enters the atmosphere, it compresses the air in front of it.
一旦进入大气层，甲烷就会吸附那些通常消散到外太空的地球红外辐射。
Once in the atmosphere, methane absorbs terrestrial infrared radiation that would normally move into outer space.
当火上爆发式会有很多吨的粉尘进入大气层，之后便反射了光线。
When large volcanoes erupted they just burst tons of particle into the atmosphere where the particles then reflect light.
小的危险是这种垃圾会打到人身上，少量碎片还会重新进入大气层。
There is a small risk that this rubbish will smack into human beings when minor amounts of it re-enter the earth's atmosphere.
这些测试使放射性原子进入大气层，气流挟裹了这些原子，并在全球范围内扩散。
The tests lofted radioactive atoms high into the atmosphere, where air currents caught the atoms and then dispersed them around the planet.
当我们把燃料用于车辆和火电厂时，大量多余的二氧化碳进入大气层。
When we burn fuels in vehicles and power-stations, huge amounts of extra carbon dioxide go into the atmosphere.
他还表示，这一计划还阻止了约1亿3千七百万吨到2亿吨的二氧化碳进入大气层。
It has also, he claims, prevented between 137m and 200m tonnes of carbon dioxide from entering the atmosphere.
大多数碎片会在48小时之内重新进入大气层，而剩余的碎片会在40天内离开轨道。
Most debris should re-enter the atmosphere within 48 hours, and the remaining pieces will leave orbit within 40 days.
他们点燃了太空船的控制火箭。太空船的速度减缓，开始重新进入大气层。
They fired the spacecraft's control rockets. The spacecraft slowed and began to re-enter the atmosphere.
在美国，释放进入大气层的主要一氧化碳的来源于车辆与燃气设备，火也是致使因素之一。
In the United States, the vast majority of carbon monoxide released into the atmosphere comes from vehicles and other gas-burning equipment, but fires also contribute.
能源公司常常把天然气称作纯净的燃料：燃烧天然气进入大气层的二氧化碳量大致上是煤炭的一半。
Energy firms often call gas a clean fuel: burning it releases roughly half as much carbon dioxide into the atmosphere as burning coal does.
你听说了吗？那颗人造卫星正在慢慢地返回地球，预计在未来两周之内就会进入大气层。
Have you heard that the satellite is slowly making its way back to the earth, and is expected to reenter our atmosphere within the next two weeks?
当然，太阳活动仅仅是气候变化的一个自然因素，火山喷发出气体和尘埃进入大气层也会带来这个结果。
Of course, solar activity is just one natural source of climate variability. Volcanic eruptions are another, spewing gas and dust into the atmosphere.
而这一损伤引起了航天飞机在进入大气层的过程中发生爆炸，机上所有的七名航天员全部罹难。
The damage caused the shuttle to break apart upon reentry, killing all seven astronauts on board.
这个过程可以在埃亚非德拉火山记录片中看到：冲击波在在浓烟中扩散，携带着黑暗的火山灰云进入大气层。
This process can be seen in a movie of the Eyjafjallajokull volcano where the shock waves propagating in the smoke are followed by the rise of dark ash clouds into the atmosphere.
在这种情况下，大规模的火山喷发使占绝对优势的大量气体在50万年以前进入大气层从而引发的环境灾难。
In this scenario, mass eruptions triggered environmental catastrophe by belching an overwhelming quantity of gas into the atmosphere for half a million years.
在这种情况下，大规模的火山喷发使占绝对优势的大量气体在50万年以前进入大气层从而引发的环境灾难。
In this scenario, mass eruptions triggered environmental catastrophe by belching an overwhelming quantity of gas into the atmosphere for half a million years.
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