本文论述了利用混合溶剂——结晶法提纯除虫脲的分析技术.The method was established for purification of diflubenzuron by crystal technique with mixed solvents.通过反相液相色谱方法往甲醇与水的混合流动相中加入适当调节剂,分离和测定除虫脲原药中的主要杂质.The separation and determination of the prim...
That's a skillful piece of bricklaying.那是件精巧的砌砖工作.Now, I'm going to show you something about bricklaying.我现在要告诉你一些有关砌砖的事.We don't train them only in bricklaying, but also in other building techniques.我们不仅仅...
原叶体是腐生的, 不规则分枝的地下体.The prothalli are saprophytic, irregularly branched, subterranean bodies.一种小形的、腐生的林地植物,植物体蜡白色或粉白色,有鳞状叶,花下垂;植物体干时变黑.Stem A longitudinal axis upon which are borne the leaves and reproductive organs of th...
Pav é set Dorado crystals shine on refined gold - plated metal elements delicately wrapped around a cotton cord.精致迷人的镀金金属装饰,细致围绕着手链的棉绳,绽放富丽金色密镶水晶的闪烁光彩....
Freight-car loadings continue to slack off.火车货运的运输量继续减少。The boy's jaw went slack.男孩张大了嘴巴。Many publishers have simply become far too slack.许多出版商就是变得过于懈怠了。Envelope the yarn at night slack month spring, Ping is svelte....