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来源:雅诚德英语网
Many, though, are pieces of small planets that bashed into each other over the past few billion years.
但仍有很多是过去几十亿年里小行星相互碰撞产生的碎片。
Many, though, are pieces of small planets that bashed into each other over the past few billion years.
但仍有很多是过去几十亿年里小行星相互碰撞产生的碎片。