An exposed concrete body with flagged surface forms the center of the house.

一个暴露的带有铺石板的混凝土躯干是住宅的中心。

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"You would basically render extinct all surface forms of life, " Tyson said. "But it may be that subterranean life is … immune to this kind of violence in the universe.

泰森说：“你会认为它将灭绝表面上的一切生物形式，或许宇宙中有不名生物对它有免疫力。”

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Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.

臭氧在距地球表面12至30英里的地方形成一个保护层。

《柯林斯英汉双解大词典》

"Well,one of the things that's interesting about these flexible sheets is that they can be curved, so you could imagine putting them in unconventional forms, like on the surface of a vehicle or something like that, where you don't have a flat surface."

VOA: standard.2010.02.19

According to a new computer model, liquid methane in contact with a partially hydrogen-terminated diamond surface at extremely high pressures and temperatures spontaneously forms longer hydrocarbons, and hence the material of crude oil could be formed deep in the earth.

FORBES: Deep Oil From Diamonds? Maybe, Says A New Report

The ice then melts, leaving a space below the surface, which caves in under the stress of vehicles and eventually forms a pothole.

BBC: Jetpatchers at work

Because most of the peninsula sits on a limestone shelf, there are no surface rivers, and rainwater quickly seeps underground where it gathers and forms subterranean bodies of water known as cenotes.

CNN: 3 undeniable reasons to explore Mexico