所以农业的扩张很可能对地球大气的组成产生深远的影响。
So the spread of agriculture could very well have a profound effect on the composition of Earth's atmosphere.
因为早期的地球大气中缺乏氧气，所以也缺乏起保护作用的臭氧层屏障。
Because early Earth lacked oxygen in its atmosphere, it also lacked a protective ozone barrier.
这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。
The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.
宇宙飞船进入地球大气层时被烧毁。
The spacecraft burned up as it entered the earth's atmosphere.
航天飞机重返地球大气层时因有摩擦力而减慢速度。
The force of friction slows the spacecraft down as it re-enters the earth's atmosphere.
该项目将使科学家们对地球大气层正在发生的情况有更新的了解。
The project would give scientists new insights into what is happening to the Earth's atmosphere.
由于太空舱仍在地球大气层内，因此不需要特别的服装或训练。
Because the capsule remains within the Earth's atmosphere, no special clothing or training are needed.
这个网会捕获垃圾，然后将其拉到地球大气层中烧掉。
The net catches the junk and then pulls it into the earth's atmosphere to burn up.
地球大气层中的二氧化碳分子像一个单向屏一样影响着地球的热量平衡。
The molecules of carbon dioxide in the Earth's atmosphere affect the heat balance of the Earth by acting as a one-way screen.
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.
宇宙飞船重新进入地球大气层时烧毁了。
The spacecraft burned up when it re-entered the earth's atmosphere.
在低空，轨道，无法维持太久，卫星会重新进入地球大气。
At that low altitude, this orbit will not last very long, and the satellite will reenter into the Earth's atmosphere.
这张照片是轨道侧面，或者说是边缘视角观测到的地球大气景观。
The image presents an edge-on, or limb view, of the Earth’s atmosphere as seen from orbit.
气象学主要研究地球大气，即大气活动如何决定地球的天气和气候。
Meteorology is the study of the atmosphere and how processes in the atmosphere determine Earth's weather and climate.
虽然组成地球大气78%的氮是一种惰性气体，但它却有多种化学式。
Nitrogen, which, makes up about 78% of the Earth's atmosphere, is an inert gas but it has more reactive forms.
这对地球大气有好处，不过也让这星球上的另外55亿人犹豫不决了。
That's good news for the atmosphere, but something that gives pause to the other 5.5 billion people on this planet.
因此，地球大气中吸收最多紫外线的平流层也许对这一周期变化最为敏感。
The stratosphere, the part of the Earth’s atmosphere which does most to absorb UV, might thus be expected to particularly sensitive to the cycle.
月球不会完全变黑，因为部分阳光经过地球大气之后，仍能间接照射到月面。
The moon doesn't go black because indirect sunlight still reaches it after passing through the Earth's atmosphere.
由于种种原因，在古新世-始新世极热时期地球大气中碳上升的量。
During the PETM, for reasons that are still unknown, the amount of carbon in Earth's atmosphere rose rapidly.
据我们所知，地球大气中20%左右的氧含量已保持了亿万年之久。
As far as we can tell Earth's atmospheric oxygen has remained at about 20 percent for hundreds of millions of years.
极光是由地球大气上层的气体分子与来自太阳的高能带电粒子相互作用产生的。
Aurorae are caused by the interaction between energetic charged particles from the sun and gas molecules in the upper atmosphere of the Earth.
氮是地球大气中最平常的气体，它在核电站中的主要放射性形式被叫做氮16。
Nitrogen is the most common gas in the earth's atmosphere, and at a nuclear plant the main radioactive form is known as nitrogen-16.
鲍克里说地球大气CO2浓度增加，使海水酸化，水温升高，将影响海洋生物。
Pawlik said that increasing CO2 in Earth's atmosphere acidifies and warms ocean waters, which will impact Marine life.
石油、天然气以及煤炭燃烧产品的二氧化碳是造成地球大气温室效应的罪魁祸首。
Carbon dioxide from the burning of oil, natural gas and coal is the main gas blamed for trapping heat in the atmosphere.
因此，地球大气中吸收最多紫外线的平流层也许对这一周期变化最为敏感。
The stratosphere, the part of the Earth's atmosphere which does most to absorb UV, might thus be expected to particularly sensitive to the cycle.
最后是日冕物质抛射，或是CME，一阵雨携带带电粒子云可在几天内到达地球大气。
Finally comes a coronal mass ejection, or CME, a slower moving cloud of charged particles that can take several days to reach Earth's atmosphere.
电离层与地球大气的其他圈层是不一样的，因为它是暴露在太阳的辐射之下，故而带电。
The ionosphere is distinguished from other layers of Earth's atmosphere because it is electrically charged through exposure to solar radiation.
为了使这项技术得以实施，通过“波前校正”，入射光线经过地球大气造成的扭曲会被移动。
In order for this technique to work, the distortions imposed on the incoming light during its passage through the Earth's atmosphere must be removed using a trick called "wavefront correction".
为了使这项技术得以实施，通过“波前校正”，入射光线经过地球大气造成的扭曲会被移动。
In order for this technique to work, the distortions imposed on the incoming light during its passage through the Earth's atmosphere must be removed using a trick called "wavefront correction".
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