In lines 22 through 34 you select an operating system that is not NULL from the list obtained in previous step.
从第22行到第34行从上一步中获得的数组中选择一个不为空的操作系统。
The stavudine was prepared from 5-methyluridine via six steps in 34% overall yield, in which the key step is the selective acylation of 5-methyluridine by propionyl chloride.
该路线以5-甲基尿苷为起始原料，关键步骤是5-甲基尿苷和丙酰氯的选择性酰化反应，六步反应总收率为34%。
A comprehensive evaluation on 8 fruit characteristics in 34 Guangxi longan varieties was conducted with AHP-FUZZY methods. The varieties were also classified according to the two-step cluster methods.
应用基于AHP的模糊综合评判法，对广西34个龙眼品种(单株)8个果实性状进行综合评价，并进行基于两阶段聚类法的品种等级划分。
A comprehensive evaluation on 8 fruit characteristics in 34 Guangxi longan varieties was conducted with AHP-FUZZY methods. The varieties were also classified according to the two-step cluster methods.
应用基于AHP的模糊综合评判法，对广西34个龙眼品种(单株)8个果实性状进行综合评价，并进行基于两阶段聚类法的品种等级划分。
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