Meaning they release ethylene gas as they mature—and the gas in turn accelerates ripening.

这其中的奥妙在于随着这些果实的成熟会释放乙烯，而乙烯反过来会加速果实的成熟。

Air is a mixture, not a compound, of gases.

空气是气体的混合物，而不是化合物。

Exhaust gases escape through ports in the cylinder walls.

而废气通过汽缸壁的接口排出。

However, many other human activities also let off carbon gases.

然而，很多其他的人类活动也会释放出碳气体。

The fire might have released dangerous gases and made water undrinkable.

大火可能会释放出危险气体，使水无法饮用。

And those processes generate greenhouse gases such as CO2 and methane.

那些过程产生温室气体 例如二氧化碳和甲烷。

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。

What looks like plumes of smoke, experts say those are acid gases.

专家称那看起来像烟的东西是酸性气体。

Ways must be found to prevent the poisonous gases from polluting the air.

一定要找到办法防止有毒气体污染空气。

Carbon dioxide is a major part of air pollution, also called greenhouse gases.

二氧化碳是造成空气污染的主要因素，也被成为温室气体。

We have to be able to assess the greenhouse gases on other planets.

我们需要监测到其他行星上的温室气体。

By adding other gases, like argon, a whole range of colors can be produced.

通过加入其它气体，比如氩，就会产生缤纷多彩的颜色。

The best solution, say researchers, is to halt nutrient runoff and curb greenhouse gases.

研究人员表示，最好的解决办法是停止养分的流入和控制温室气体。

The satellites will serve various purposes, including monitoring greenhouse gases and detecting forest fires.

这20枚卫星各有不同用途，包括监测温室气体与森林烟火。

Unfortunately this causes greenhouse gases which eventually leads to global warming and climate change.

不幸的是，这会生产出很多温室气体，最终导致全球变暖、气候改变。

I injected the stable isotope carbon-13 carbon dioxide gas.

我往他们的袋子中注射了 含有稳定性同位素碳13的二氧化碳。

To counteract this oxygen would have to be diluted with non reactive gas.

为了制造这种情况，氧气中的空气比率需要利用惰性气体来降低。

They take in harmful gases from the air and produce oxygen for us to breathe.

它们从空气中吸收有害气体并产生氧气供我们呼吸。

Because CFCs are also greenhouse gases.

因为氯氟烃也是温室气体。

Humans have been pumping greenhouse gases into the atmosphere for decades by burning fossil fuels.

几十年来，人类一直通过燃烧化石燃料向大气排放温室气体。