planetary core翻译

planetary core的基本解释

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行星核心(行星核心是行星最内部的层次,以铁为主要成分,可能包含几层固体和/或液体。类地行星的核心大约是直径的20%到75%,类木行星的核心尺度远小于类地行星,但可能更大。一些轨道非常靠近主星的类木行星,也许只留下了它们的核心,被称为"冥府行星"。卫星、小天体和其他小行星也许会有不同大小的核心)

例句

At their distances from the star, the rocky planetary core would have taken so long to form that the gaseous disk would have dissipated before the core could attract the gas.就它们与恒星的距离而言,其石质行星核恐怕需要极其长的成型时间,以至于在星核能够俘获气体前周围的气态盘恐怕就已经消散殆尽了。
The hot core collapses and begins to pulsate, eventually shedding its outer layers of gas to set the stage for the birth of a planetary nebula.恒星高温的核心坍缩,并开始有规律的振动,最终气体外层迸散,为行星星云的形成提供了有利条件。
The finding suggests one commonly accepted model of planetary formation, where icy chunks glom into a core, wouldn't work here.这项发现表明,一个被广泛认可的行星构成模型——由巨大的冰块填充的行星内核,将不会存在。
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