There's water and there's sulphur dioxide.

这是水分子，这是二氧化分子。

And that sulphuric acid is made by sulphur dioxide coming out of volcanoes on the surface.

这些酸来源于二氧化产生于地表的火山。

Coal releases lots of nasty stuff into the atmosphere, including sulphur dioxide and nitrous oxides, both major contributors to acid rain.

煤向大气中释放大量有害物质，包括二氧化和一氧化二氮，两者都是酸雨的主要来源。

As the super-hot cloud moves along the ground, some of the gas trapped inside—including a lot of sulphur dioxide—starts rising.

热云沿着地面移动时，一些被困里面的气体，包括大量的二氧化，始上升。

But there was no incentive for the power plants to stop emitting sulphur dioxide.

但发电厂没有动力停止排放二氧化。

The sulphur dioxide level in the air was 32 parts per billion.

【part】空气中二氧化的含量是十亿分之三十二。

The rest of the gas is nitrogen, carbon dioxide, sulphur dioxide, methane, ammonia and hydrogen.

剩下的气体是氮气、二氧化碳等气体。

They're carrying devices that measure gases, especially sulphur dioxide, which can pose a danger to health and even be fatal.

他们携带测量气​​体的设备，尤其是二氧化， 这可能对健康构成威胁， 甚至是致命的。

Fumigants such as hydrogen cyanide, sulphur dioxide and DDT itself are now regarded in most places as too toxic to use.

氰化氢、二氧化和滴滴涕等熏蒸剂本身现大多数地方都被认为毒性太大而无法使用。

Gas-fired stations emit much less carbon dioxide, per unit of electricity, than coal, which also gives off all sorts of other nasties when burned, from sulphur dioxide to mercury.

生产同一单位的电，燃气发电厂排放的二氧化碳比燃煤发电厂排放的少。除此之外，煤燃烧时也会产生各种有害气体，包括二氧化和汞。

Older volcanic rocks tend to emit less infrared, say the researchers, because carbon dioxide and sulphur dioxide in the planet's atmosphere weather the rocks and change their composition.

研究人员说，较旧的火山岩往往发出较少的红外线，因为二氧化碳和二氧化地球大气中使岩石风化并改变它们的成分。

For years, its power stations had been emitting large amounts of sulphur dioxide, which was falling back to Earth as acid rain, causing harm to plants, aquatic animals and infrastructure.

多年来，它的发电站一直排放大量二氧化，这些二氧化以酸雨的形式回落到地球上，对植物、水生动物和基础设施造成伤害。