The lump sum of the mass turned out to be a minimum of 400billion suns - enough to indicate that the astronomers had indeed uncovered a massive proto-cluster.
这一质量汇集在一起比4000亿个太阳还要大 - 足以表明，天文学家发现的确实是一个巨大的原星团。
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The purpose of this paper is to find out an approach of inverse eigenvalue problems of undamped mass-spring system by using an attached lump of known mass.