;以确保婴孩出生前的健康 preparation n.准备(工作), 预备;制剂 Preparation for a wedding can exhaust a couple. ;婚礼的准备工作可以使 一对夫妇筋疲力尽.
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The alumina ceramics is gel-mould cast with low toxic N methylolacrylamide system. This paper reports the investigation on the preparation of alumina suspension and its solidification process.
采用低毒的N 羟甲基丙烯酰胺体系凝胶注模成型氧化铝陶瓷,研究了该体系下浓悬浮体的制备及固化过程。
Unlike common amino acids, the preparation of these N-protected precursors requires rather elaborate synthetic schemes typically starting from the parent heterocycles.
与普通的氨基酸不同,这些N 段保护前体的准备需要更加复杂的合成方案,典型的合成从母链开始。
In purifying phase, the extracts were disposed by silica gel column chromatography and preparation lamella chromatography, then crystaled by N-Hexane.
纯化阶段,硅胶柱色谱及制备型薄层色谱处理提取物,正己烷沉淀结晶。
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