Old crust is destroyed as it rolls down into the hot area and melts again.

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

Soon the sun's warmth makes them shed crystal shells - Shattering and avalanching on the snow crust-- Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.

阳光的温暖接着使那水晶的硬壳,从树枝上崩落，一齐倾泻在雪地上-,这么一大堆碎玻璃尽够你打扫,你还以为是天顶的华盖塌了下来。

耶鲁公开课 - 现代诗歌课程节选

Later,the crust pulled apart. The area between the mountains broke and fell down.

VOA: special.2010.01.04

New crust is created as melted rock pushes up from inside the planet.

VOA: special.2010.01.12

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

VOA: special.2010.01.12

Then,seventy-million years ago, the Earth's surface, or crust,pushed upward.

VOA: special.2010.01.04

Soon the sun's warmth makes them shed crystal shells Shattering and avalanching on the snow-crust-- Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.

VOA: special.2010.09.17

Alexander chronicles those experiences in his book,"52 Loaves: One Man's Relentless Pursuit of Truth, Meaning and a Perfect Crust."

VOA: standard.2010.07.16

"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

I never knew bread could be this good; the crust was this dark brown, sweet crust that turned chewy in your mouth.

VOA: standard.2010.07.16

Earthquakes generally occur when the tectonic plates that make up the Earth's crust move suddenly.

VOA: standard.2010.01.13