These were the spherules just discovered by Doctor Keller.

它们就是Keller博士发现的小球体层。

After the Chicxulub impact, the spherules settled on the sea floor within minutes.

希克苏鲁伯后，小球体几分钟内便落到海底。

They were excited because these spherules were eight metres below where any had been found before.

他们激动是因为这些小球体所在的位置比到的地方低了8米。

In outer space the vapour condensed into tiny droplets which fell back all over the earth as white hot spherules.

在外太空，它们凝缩成微小的熔珠，它们落满整个地球，变成白热的小球体。

On top of the spherules, there seemed to have been a period of normal sedimentation, eight metres of mud had built up.

小球体层上面似乎有一个正常沉淀的时期，堆积了8米厚的泥沙。

It looked as if the world's forests had spontaneously ignited as the rain of spherules heated the atmosphere by up to a thousand degrees centigrade.

看起来好像是从气中落下的小球体雨，带着1000℃的高温自动点燃了全世界的森林。