The method was established for purification of diflubenzuron by crystal technique with mixed solvents.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 separation and determination of the primary impurities of diflubenzuron by liquid chrom...
Nicks and scratches spread, eating up body ( trade - in value, too ).裂痕与刮伤易延伸, 侵蚀车身 ( 也影响汽车折价 ).Try strokes , caresses, nips, pinches and gentle scratches.你可以试试敲打, 轻抚, 掐, 捏,或是轻轻抓挠.I pointed to a number of scratches in th...
The deposit is genetically of hypothermal type . Ore _ forming solutions have abundant acidulous water and mephitic air.成矿溶液属于气成高温热水溶液,且富含大量碳酸或碳酸气.His acidulous remarks towards the mayor put everyone ill at ease.他对市长尖刻的评...
They were afraid of answering the questions and incriminating themselves.他们担心因回答这些问题而受到牵连。They are afraid of incriminating themselves and say no more than is necessary.他们害怕受牵连，一句话也不肯多说。He listened to Smillie's recou...