我曾祖母都会留一小部分烟草自己卷烟来抽，因为她对工厂的滤烟技术呲之以鼻。
Zelma kept a small portion of the farm’s tobacco, which she used to roll her own cigarettes, disdaining the introduction of filters.
我曾祖母都会留一小部分烟草自己卷烟来抽，因为她对工厂的滤烟技术呲之以鼻。
Zelma kept a small portion of the farm's tobacco, which she used to roll her own cigarettes, disdaining the introduction of filters.
本文提出嘌呤、嘧啶、呲啶、噻唑、生物碱和氨基酸等类有机化合物中氮的快速微量测定法。
A rapid micromethod for the determination of nitrogen in organic compounds, such as pyridine, pyrimidine, purine, thiazole, alkaloids and amino acids, is described.
本文提出嘌呤、嘧啶、呲啶、噻唑、生物碱和氨基酸等类有机化合物中氮的快速微量测定法。
A rapid micromethod for the determination of nitrogen in organic compounds, such as pyridine, pyrimidine, purine, thiazole, alkaloids and amino acids, is described.
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