earth crust

基本解释

Explosions are registered by seismographs and they define the structure of Earth crust.
每次爆炸均由地震仪测量，科学家则根据测量结果判定出地壳构造。
Kurile Lake was formed 8300-8400 years ago by a large volcanic explosion and a collapse of the Earth crust.
库页湖形成于8300—8400年前的一次大型火山喷发与地壳下陷。
Variations of gravity field in this area may be caused by the earth crust deformation, quality transition in deep crust and fault creep deformation.
重力变化可能是由该区地壳形变、地壳深部质量迁移和断层蠕动共同作用引起的。

They float on pieces of the Earth's outer skin,or crust.
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
Then,seventy-million years ago, the Earth's surface, or crust,pushed upward.

Such depths are commonplace when sample cores are drilled out of the earth's crust by geologists.
ECONOMIST: The hole story of global warming