The gray band are objects that were not evicted.

灰色带是没有被逐出的对象。

youdao

The light gray band are objects that were evicted.

浅灰色带是被逐出的对象。

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Between one edge of the three-foot-thick gray band and the other, some 80 percent of marine species died out, many of them the sorts of creatures, like graptolites, that no longer exist.

在约1米厚的灰色岩石带子的各个带层之间，约80%的海洋物种灭绝了，其中许多是生物物种，象笔石动物，再也不会在这个世界上存在了。

youdao

But there was a band of blue sky just above the gray, the blue you see in tropical postcards, the blue of the Mediterranean.

NEWYORKER: Beginners

"We like to think of our sound as fairly unique, " laughs David Gray, a music teacher, one of the four members of the Yelverton-based band.

BBC: Brass helps create Yelverton band's sound

"We re not a band of one guy and a bunch of others standing around making him look good, " says Tom Gray.

NPR: Gomez: 'How We Operate'