空气为混合气体。
这些气体没有气味。
Sulphur gases were emitted by the volcano.
硫磺气体由火山喷发出来。
These gases cause untold damage to the environment.
这些气体对环境造成难以估计的破坏。
These gases pollute the atmosphere of towns and cities.
这些气体污染城镇的空气。
He passed an electric spark through a mixture of gases.
他使一束电火花穿过一团气体混合物。
The volcano spewed out more scorching volcanic ashes, gases, and rocks.
该火山喷出了更多灼热的火山灰、各种气体和岩石。
Inert gases like neon and argon have eight electrons in their outer shell.
像氖和氩这样的惰性气体，在它们的外电子层有8个电子。
The gases that may be warming the planet will have their main effect many years hence.
这些可能正在使行星变暖的气体，其重要影响将在许多年之后显现。
When gases are heated, they expand.
气体受热会膨胀。
These materials are now known to let out harmful gases.
这些材料被公认为会释放有害气体。
Insect farming also produces far fewer greenhouse gases.
昆虫养殖产生的温室气体也少得多。
It is more difficult for gases to "evaporate" from them.
气体更难从中“蒸发”出来。
They are made up of ice and other frozen liquids and gases.
它们是由冰、其他冷冻液体和气体构成。
They fill these tubes with gases that glow when electrified.
他们在这些管子里注入了通电后会发光的气体。
We should lower the use of fuels that release greenhouse gases.
我们应该减少使用那些会释放温室气体的燃料。
If plastic and rubber are burnt, they'll give off poisonous gases.
要是塑料和橡胶被焚，就会放出有毒的气体。
Emission of these "greenhouse" gases contributes to global warming.
这些“温室”气体的排放会导致全球变暖。
Our use of fossil fuels is the main source of excess greenhouse gases.
我们对化石燃料的使用是温室气体过量的主要来源。
As a comet gets closer to the sun, some gases in it begin to unfreeze.
当彗星接近太阳时，其中的一些气体开始解冻。
It is believed that greenhouse gases are the main cause of global warming.
人们相信温室气体是全球变暖的主因。
It is believed that greenhouse gases are the main causes of global warming.
一般认为温室效应气体是导致全球变暖的主因。
The lack of atmosphere can cause gases in the body to expand and even burst.
没有大气层会导致人体内气体膨胀甚至炸裂。
The result would be higher emissions of carbon dioxide and other greenhouse gases.
其结果会是二氧化碳和其他温室气体的排放量增加。
Exactly, these gases account for nearly half the amount of greenhouse gas emissions.
确切地说，这些气体占温室气体排放量的近一半。
In order to reduce global warming, emission of greenhouse gases needs to be reduced.
为了减缓全球变暖的现象，需要减少温室气体的排放。
We should minimize the use of private cars, which emit a large amount of greenhouse gases.
我们应该减少私家车的使用，因为私家车排放大量的温室气体。
Factories that gave out harmful gases were all shut down after the policy came into effect.
在政策生效之后，所有排放有害气体的工厂都关闭了。
Emitting too much greenhouse gases such as carbon dioxide lies at the root of global warming.
排放过多温室气体，如二氧化碳，是全球变暖的根本原因。
Explorers even need to wear special masks to protect themselves from the gases in these caves.
探险家们甚至需要戴上特殊的面具来保护自己不受洞穴里气体的伤害。
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