After numerous attempts, it was first synthesized in 1965 by Rowland Pettit of the University of Texas, although he could not isolate it.
年,德国化学家Posselt和Reimann首次将尼古丁由烟草中分离出来。
In 1828, Germany chemists Posselt and Reimann isolated nicotine from tobacco the first time.
新西兰代表团支持特别报告员用时间因素的方法审查本专题,从而以务实的方法把有关法律问题分离出来。
Her delegation supported the Special Rapporteur' s temporal approach to the examination of the topic as a practical way of isolating the legal issues concerned.
然后,这些石英在一个强大的电炉中被炸开,形成一种化学反应,将大部分氧气分离出来。
That quartz is then blasted in a powerful electric furnace, creating a chemical reaction that separates out much of the oxygen.
当他们利用酶处理大肠杆菌细胞时,ssDNA就会被释放出来,他们将它分离出来,随后让它折叠成靶结构。
When they treated the bacteria with enzymes to free up the ssDNA, they could isolate it, and then fold it into its target structure.
金属环辛二烯配合物很具有吸引力,因为它们足够稳定可以被分离出来,稳定性通常超过类似的乙烯配合物。
Metal-COD complexes are attractive because they are sufficiently stable to be isolated, often being more robust than related ethylene complexes.
However, another positive-stranded RNA virus, which closely resembles DENV, is Zika virus(ZIKV), first isolated in Uganda in 1947.
渥太华谷上游单独存在的野生树木既可能是从本地种群中分离出来的,也可能来源于种植的树木[1]。
Isolated wild trees in the Upper Ottawa Valley may be an isolated native population or may have derived from planted trees.
而把你从自己的感觉和情绪中分离出来,你就可以解放你的思想来帮助入睡。
By detaching yourself from your feelings and emotions, you can free your mind to help you sleep.
我希望找到一个不擅长把性从情感中分离出来的男人。
I am hoping to find a man who isn't that good at detaching sex from emotion.
Terra公司最终在塞内加尔的达喀尔建了一座工厂,用来除去谷物的外壳,并将沙子分离出来。
Terra Ingredients eventually built a plant in Dakar, Senegal to remove the grain's hulls and separate out the sand.
最近的研究已经成功解决了这一难题--即在不受其他混杂因素影响的情况下,将饮酒对健康的影响分离出来。
More recent studies have been able to address this challenge of separating out the effect of drinking on health, independent of other confounding factors.
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