英语词汇negative ion mass spectrum怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	negative ion mass spectrum
释义	negative ion mass spectrum 简明释义负离子质谱网络释义 1 ?负离子质谱 ... 负离子源 negative ion source 负离子质谱 negative ion mass spectrum; negative-ion mass spectrum 硅负离子 silanion ... 短语 1 Negative ion mass spectrum 分化负离子质谱双语例句 1 The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum, nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum. 通过红外光谱、核磁共振和负离子电喷雾质谱三种表征技术鉴定了原油中的石油酸结构和组成。
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