This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.

这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。

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It is a metallic element that is found in the crust of Earth.

这是一种金属元素，存在于地球的地壳。

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The formation of Earth's crust protected the inner layers of Earth from the high-energy particles in space, reducing the temperatures of the mantle and the core.

地壳的形成保护了地球的内层不受太空中高能粒子的影响，降低了地幔和地核的温度。

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They float on pieces of the Earth's outer skin,or crust.

VOA: special.2010.01.12

And, seawater contains only 3.7% of the total magnesium present 7% in the Earth's crust.

而海水只含有,地表镁总量的,3。

麻省理工公开课 - 固态化学导论课程节选

"It's a horizontal motion of two pieces of the Earth's crust on either side of a vertical crack in the Earth,"

VOA: standard.2010.01.13

"The recent earthquakes in Manchester and Italy have highlighted our need to better understand the movement of the Earth's crust in England, " said Dr Matt King of Newcastle University's School of Civil Engineering and Geosciences.

BBC: Satellite technology aids quake research

From the harmonies of randomness to the dynamics of the Earth's crust, Kahn uses scientific principles to create mesmerizing works of art.

NPR: Artist Captures Wonder of Natural Phenomena

The Department of Energy estimates the amount of fluid hydrocarbons remaining in the Earth's crust is the equivalent of 7.6 trillion barrels of oil.

FORBES: The Big Plunge