The qualitative analysis of N polyaromatics in heavy oil was made by a double adsorption separation followed by the application of low voltage ionization and high resolution MS direct sampling.
通过两次吸附分离，然后采用低压电离，高分辨质谱直接进样技术对重馏份油中的含氮多环芳烃进行定性测定。
While Allison O'Steen, Tryon, N. C. , loved her late mother, she says, her habit of ironing sheets isn't something Ms. O'Steen, a mother of two, wants to pass on.
北卡罗来纳州两个孩子的母亲阿里森·奥斯汀(AllisonO'Steen)说，尽管她爱已故的母亲，但她却不想继承母亲熨床单的习惯。
While Allison O'Steen, Tryon, N. C. , loved her late mother, she says, her habit of ironing sheets isn't something Ms. O'Steen, a mother of two, wants to pass on.
北卡罗来纳州两个孩子的母亲阿里森·奥斯汀(AllisonO'Steen)说，尽管她爱已故的母亲，但她却不想继承母亲熨床单的习惯。
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