And massive caldera at some of it could easily swallow greater London, Paris and New York.

一些巨大的山口喷火能轻易地吞下伦敦、巴黎和纽约。

The caldera is 48 by 72 kilometers.

火山口长 48 x 72 公里。

They sit in one giant caldera of a super volcano.

他们坐在 一座超级火山的一个巨大破火山口中。

Then the truck came back up the caldera with the lights off.

然后卡车回到火山口， 灯也关了。

It left behind a caldera spanning 20km and it caused the entire Southern Hemisphere to undergo a period of abrupt cooling.

爆发形成的破火山口有二十公里宽，并导致整个南半球进入一段突然的降温期。

But taken together, the data point convincingly to the existence of a caldera about 20 kilometers across.

但综合起来， 这些数据令人信服地表明存在一个直径约 20 公里的火山口。

He was half way back up the caldera to his truck when something made him stop.

当他沿着火山口回到卡车的途中， 有什么东西让他停了下来。

The spotlight came on again at the head of the caldera and moved across the ridge.

聚光灯在火山口的顶端再次亮起， 并穿过山脊。

But that's exactly what the team hopes to do to confirm the caldera's existence.

但这正是团队希望做的事情， 以确认火山口的存在。

" These very large calderas have very large impacts globally, " says Power.

“这些非常大的火山口在全球范围内具有非常大的影响， ” 鲍尔说。