| 单词 | presupernova | 
| 释义 | > as lemmaspresupernova   presupernova  n.  Brit. , U.S. , ΚΠ 1959    Physics & Chem. Earth 3 202  				An equilibrium theory of element formation in the interiors of presupernovæ is one of the mechanisms currently believed responsible for nucleogenesis. 1988    Nature 21 Jan. 237/2  				We suggest that such a star was indeed present as a binary companion to star 1 and was the actual presupernova. 1997    Science 30 May 1360/3  				For rapid evolution as in a presupernova, or a supernova explosion itself, these conditions do not hold, and the spherical approximation fails. < as lemmas | 
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