例句與造句

1. The evolution of fixed star having something to do with nuclear reaction , the star generally loses partial mass in its final period and finally collapses into compact star ( white dwarf , neutron star or black hole )
   恒星的演化與核反應有關(guān)，演化到晚期的恒星一般要損失一部分質(zhì)量，然后坍縮成致密星(白矮星、中子星或黑洞) 。
2. It's difficult to find partial mass in a sentence. 用partial mass造句挺難的