traces of heavy metals 中文意思是什麼
traces of heavy metals
解釋
重金屬痕量-
" the modern techniques employed in the government laboratory make possible the identification of the minutest traces of such substances as pesticides, heavy metals or veterinary drug residues in foodstuffs, and the same is true for the determination of toxic pollutants in air and water
他說：政府化驗所應用的現代科技精密，即使食物只含極微量的除害劑、重金屬和殘餘禽畜藥物等物質，也可檢測出來，亦能夠分析出水和空氣中有毒物質的含量。
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