范艾伦辐射带是由带电粒子组成的两个甜甜圈形状的环状物——其中一个挨靠在另一个内部——环绕着我们地球。
The Van Allen belts are two doughnut-shaped rings of charged particles-one nestled inside the other-that encircle our planet.
有这样的地幔气体的补充，Holland说：“你不能排除地球内部的气体来组成大气——大气有其他别的来源。”
With such a makeup of mantle gases, Holland says, "you can't outgas the interior to make the atmosphere—the atmosphere has to come from somewhere else."
科学家怎么知道地球内部的组成？
地球的内部由两部分组成：地核和地幔。
Internally the earth consists of two parts, a core and a mantle.
冲击波动态高压技术已成为人们研究、认识地球内部物质组成、状态及其性质的重要手段和方法之一，在固体地球科学研究中发挥着重要作用。
Shock compression has become an important method to advance our understanding of the deep Earth's interior, and has played an important role in the research of solid Earth science.
冲击波动态高压技术已成为人们研究、认识地球内部物质组成、状态及其性质的重要手段和方法之一，在固体地球科学研究中发挥着重要作用。
Shock compression has become an important method to advance our understanding of the deep Earth's interior, and has played an important role in the research of solid Earth science.
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