| 单词 | proton-proton reaction | 
| 释义 | proton-proton reaction [`prō´tän `prō´tän rē´ak·shǝn]  NUCLEAR PHYSICS The initiating reaction in the proton-proton chain, in which two protons react to form a deuteron, a positron, and a neutrino. Abbreviated PP reaction.  | 
	
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