痕量元素微量元素trace element: 痕量[微量]元素。 composite additive of trace elements: 復(fù)合微量元素添加劑deficiency of trace elements: 微量元素缺乏determination of trace elements: 微量元素的測定geochemistry of trace elements: 微量元素地球化學(xué)下載手機詞典可隨時隨地查詞查翻譯