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单词 antineutrons
例句 DEFINITIVE EXAMPLES 权威例句〔antimatter〕A hypothetical form of matter that is identical to physical matter except that its atoms are composed of antielectrons, antiprotons, and antineutrons.反物质:一种假想的物质形式,与自然物质相同的,只是其原子由反电子,反质子和反中子构成美国传统
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