但是,与内行星的核心不同,月球的核心几乎不含铁,而典型的行星形成物质则富含铁。
But, unlike the cores of the inner planets, the Moon's core contains little or no iron, while the typical planet-forming materials were quite rich in iron.
好的,这就是波尔模型,波尔的原子模型是行星模型或者核心模型。
OK, this is the Bohr model, Bohr model of the atom is planetary or nuclear.
模拟显示,在冰层脱离之后,土星的引力将导致这颗卫星的硅酸盐核心的毁灭,将它越拉越近,最终撞向这颗行星。
After pulling off the ices, the gravity of Saturn would have doomed the moon's silicate core, tugging it closer and closer until it smashed into the planet, the simulation shows.
OK, this is the Bohr model, Bohr model of the atom is planetary or nuclear.
好的,这就是波尔模型,波尔的原子模型是行星模型或者核心模型。
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