became a dwarf planet
变成了矮行星
以上为机器翻译结果,长、整句建议使用 人工翻译 。
The presence of this familiar material, scientists say, implies that an Earth-like planet may have orbited the star millions of years ago, before it became a white dwarf.
科学家说,这样接近的物质组成说明GD 362在还未变成白矮星的几百万年前,曾有类似地球的卫星绕转。
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