They found hydrogen sulphide levels decreased in 80% of participants.

他们发现受试者口腔内的硫化含量降低80%。

That distribution gives the sensor the sensitivity it needs to detect trace amounts of H2S.

这种分布方式让传感器拥有检测微量硫化所需的灵敏度。

Hydrogen sulphide gas bubbles up from oil deposits in the Earth's crust.

硫化气体从地壳内的油气储层中溢出。

Second, it's about what scientists say they've detected in the planet's clouds, hydrogen sulfide.

其次，这是家所说的，他们在地球的云层中发现硫化。

The action of oil and natural gas created hydrogen sulfide in the limestone.

石油和天然气的作用在石灰岩中产生硫化。

The hydrogen sulfide reacted with oxygen in rainwater moving through the rock.

硫化与流过岩石的雨水中的氧气反应。

Which is about a fifth as much H2S as you'd need to have stank breath.

而五倍这种浓度的硫化才会产生口臭。

But the exoplanet was previously not thought to hold hydrogen sulfide.

但是，这颗系外行星此前被认为并不存在硫化。

The gas is a hydrogen sulphide mix that corrodes every surface it lands on.

这种气体是一种硫化的混合物，其所到之处，必受腐蚀。

The hydrogen sulphide that these men must breathe in is 40 times the safe level.

他们吸进的硫化是安全限度的四十倍。

They're also monitoring the air for traces of hydrogen sulfide and sulfur dioxide.

他们还在监测空气中硫化和二氧化硫的痕迹。

These gases are a death filled cocktail of hydrochloric acid, hydrogen, hydrogen sulfide, and sulfur dioxide.

这些气体是由盐酸、气、硫化和二氧化硫混合而成的致命混合物。

But, as they watched the beakers, a bunch of the hydrogen sulfide seemed to be disappearing.

但是，当他们观察烧杯时，一束硫化似乎正在消失。

These sediments were anoxic, or poor in oxygen, and they were also full of hydrogen sulfide.

这些沉积物是缺氧的或含氧量很低的，并且它们充满硫化。

So, in this case, the hydrogen sulfide could have lost electrons in a redox reaction.

因此，在这种情况下，硫化可能在氧化还原反应中失去电子。

Jupiter, too, has small amounts of hydrogen sulfide in its atmosphere.

木星的大气层中也有少量的硫化。

It warned some communities about high levels of hydrogen sulfide gas escaping from the rotting algae.

它警告一些社区注意从腐烂的海藻中释放出的高浓度的硫化气体。

In deep, dark ocean ecosystems, some bacteria use chemicals like hydrogen sulfide as their energy supply instead.

在深海、黑暗的海洋生态系统中，一些细菌使用硫化等化物质作为它们的能量供应。

The earliest Earth was full of hydrogen, of hydrogen sulphate, had a lot of methane, some carbon dioxide.

最初地球上充满、硫化甲烷以及一些二氧化碳。

To test the device, the researchers puffed it with different concentrations of hydrogen sulfide gas.

为测试这个设备，研究员使用不同浓度的硫化气体。