The application principles and methods are demonstrated of nuclear radiation technique in gemmology.阐述了核辐照技术在宝石学中的应用原理和方法....

n.宝石学...

gemmology的音标：gemmology的英式发音音标为：[dʒe'mɒlədʒɪ]gemmology的美式发音音标为：[dʒe'mɒlədʒɪ]...