... 左旋圆偏振：polarization 左旋系统：left-handed system 左旋物质：levo-rotatory substance ...
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左旋咪唑的系统适用性 Levamisole for system suitability
目的：评价左旋氧氟沙星治疗泌尿系统感染两种方案的经济效果。
Objective: To investigate the economic effects of two levofloxacin therapeutic schemes for urinary system infection.
目的：建立制备色谱层析系统制备左旋多巴类似物（简称：LDA）对照品的方法；
Objective: To establish the preparation method of levodopa analog (abbreviate: LDA) reference substance by AKTA Explorer 100 Preparative Chromatography System;
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