Perhaps the ash fall from an eruption pulled her from her web and smothered her.

大概是在一次火山喷发中，火山灰把它从网上打落下来，并使其窒息。

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Being downwind from a volcano is to be avoided, where ash fall is heaviest, disbursing into the atmosphere thereafter.

要避免在火山的下风口，因为此处的火山沉降物是最多的，之后还会飘进地球大气层。

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However, the direction of the new Westerlies, and the location of land masses and known volcanic regions, and thus the direction of the heaviest ash fall, can be easily gauged.

然而，新出现的西风的方向和陆地的位置，以及已知的火山区，还有火山灰降落最重的区域是可以很容易地计算出来的。

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"Light volcanic ash fall can be anticipated downwind of Tongariro", it said, potentially affecting the Waikato, Hawkes Bay, Gisborne and Bay of Plenty areas.

BBC: New Zealand's Mount Tongariro erupts

Christian Raymond Brown, 40, from Kirton-in-Lindsey, sustained serious head injuries in the fall near Ash Grove Farm on the A631 at North Willingham, on 12 February.

BBC: Pothole

It is less useful for ash which has yet to fall and instead is distributed, in clumps and layers, at various altitudes and thus in different wind conditions through a large patch of atmosphere.

ECONOMIST: Volcanoes and air travel: Small eruption in Iceland | The