1.Guanine A nitrogenous base found in DNA and RNA.Guanine has a pruine ring structure.
1.是存在于DNA与RNA中的一种含氮，有一个嘌呤环结构。
2.Preoxygenation replaces the primarily nitrogenous mixture of ambient air, which constitutes the patient's functional residual capacity, with oxygen.
2.这样可以用氧气之前被氮气占据的肺泡。
3.Malt extract is made by extracting the soluble products from sprouted grain,used in mycological as a source of carbohydrate and nitrogenous.
3.性状本品系大的水溶物，用于配制真菌培养，供碳水化合物及氮源。
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1.Each composition of this nitrogenous base, pentose sugar, and phosphate group is called Nucleotide.
这种含氮碱基、戊糖和磷酸基的每一种苷酸。
2.Other nitrogenous wastes include uric acid and creatinine.
其他含氮废物包括尿酸和肌酐。
3.One of the most important things the kidneys excrete is nitrogenous waste.
肾脏排出的最重要的东西之一是含氮废物。
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划词翻译
详细解释
，
有一个嘌呤环结构。
之前被氮气占据的肺泡。
苷酸。
