地球内部的熔铁围绕其核心的超高温固体铁核流动，由此产生了地球磁场。
The planet's magnetic field is generated by the motion of molten iron flowing around a superhot, solid iron core.
评论和讨论了高功率固体激光器、光纤激光器、超高效率二极管源和中继镜技术的重大进展。
The significant progress of high power solid-state laser, fiber laser, super high efficiency diode source and relay mirror system are reviewed and discussed.
模拟结果与已有实验结果吻合，说明采用雷诺应力湍流模型能准确描述超高速离心叶轮中固体颗粒的运动轨迹。
The conclusions show that Reynolds stress model can be used to describe the tracks of particles in the extra-high speed centrifugal impeller accurately.
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