heavy element短语⁹⁰⁸⁸⁷⁺⁷ 基本例句 重元素 RBS analysis results show that PIXE is a rapid and sensitive method for measuring the thickness distribution of thin heavy element film on light element substrate deposited by FVAPD. 通过同背散射分析 RBS测量结果的比较表明：利用在轻衬底上合成重元素薄膜的 PIXE分析可以快速、无损和精确地测量 FVAPD装置合成薄膜的均匀性。 cnki