Volcanic ash provides nutrients to nearby soil, making the land fertile.

灰为附近的土壤提供养分，使土地肥沃。

The ash can melt if it's sucked into plane engines, so pilots are told not to fly through it.

灰会被飞机引擎吸入而融化，所以，飞行员被要求不要从灰里穿过。

Ash and cinders blazed down from the erupting volcano.

炽热的灰渣从爆发的纷纷喷发落下.

They analysed it to find out what had fallen in over time—bits of plants, volcanic ash and even DNA from the mammoths themselves.

们对其进行了分析，来找出随着时间流逝什么东西出现了——植物，灰，甚至是猛犸象自己的DNA。

If you inhaled too much, you could eventually develop silicosis.

如果吸入太多灰，你最终会患上矽肺病。

But volcanic ash can be sand too.

但是灰也可以是沙子。

And some areas where ash is falling, residents were given masks to help them breath.

在一些灰下落的地区，政府给予当地民众面罩来助们呼吸。

It was active for about three weeks then, sending ash high into the air and blasting blocks, weighing as much as 14 tons.

它活跃了大约三周，将灰升到空中，并爆破重达14吨的石块。

Lava fountain sprayed, magma flowed, ash rained down on the surrounding region.

熔岩喷泉喷出，岩浆流出，灰如雨点般在周围地区落下。

Mt. Semeru is the tallest mountain on the island, and its eruption has left entire villages covered with ash, hundreds of homes destroyed and more than a thousand people without a place to live.

塞梅鲁是岛上最高的，这次喷发导致村庄被灰完全覆盖，数百所房屋被毁，千余人无家可归。

That's how much of it was in the air.

空气中有很多（烟雾灰）。

And one thing that's a threat to them are pyroclastic flows, when a mix of lava blocks, ash and volcanic gas rush down the slopes of a volcano.

对它们构成威胁的是碎屑流——即熔岩块、灰气体的混合物冲下斜坡（的过程）。

Volcanic ash covered the fields and famine began.

灰覆盖了田野，饥荒开始了。

There is also a concern over volcanic ash and its effect on farmland.

灰对农田的影响也令人担忧。

Beneath the protecting shroud of ash, the city lay intact.

在厚厚的灰的保护下，这座城市完好无损。

There have been flights that have been delayed as a result of the ash, because, of course, ash, once it is emitted into the atmosphere, can be very damaging, very dangerous cure to air travel.

有航班因为灰而延误，因为，当然，灰一旦被排放到大气中，对航空旅行是非常有害，非常危险的。

With an explosion like that, ash may fall on surrounding villages.

像那样程度的爆发，灰就可能会落到周围的村庄上。

He says he doesn't know where he's going, just somewhere out of the volcano's reach.

说不知道要去哪里，只要是灰无法波及的地方就行。

Slowly, his house had filled up with grey ash.

慢慢地，的家里充满了灰色的灰。

Government offices are also closed and flights have been cancelled because volcanic ash can melt inside jet engines and badly damage them.

政府停摆。诸多航班，因灰可融化内部发动机带来严重后果而停飞。