The best suggestion is that Jupiter is still contracting gravitationally despite its age of several billion years.
最好的说明是：木星尽管已有几十亿年的历史，但由于引力作用，它仍在收缩。
The best suggestion is that Jupiter is still contracting gravitationally despite its age of several billion years.
最好的说明是：木星尽管已有几十亿年的历史，但由于引力作用，它仍在收缩。
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