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- Objective: 4-hydroxycoumarin is a pivotal intermediate in synthesis of other 4-hydroxycoumarin derivatives.This article aims to investigate the optimal condition in synthesis of 4-hydroxycoumarin. 目的:4-羟基香豆素是合成其他4-羟基香豆素衍生物的关键中间体,本研究摸索出了合成4-羟基香豆素的最有效条件。
- That is the pivot of the whole argument. 这是整个论据的关键。
- Their daughter was the pivot of their lives. 女儿是他们生活的中心。
- pivotal intermediate (关键)中间体
- I've passed the intermediate level exam of Japanese. 我已经通过了日语的中级水平考试。
- A type of cherry intermediate between a sweet and a sour cherry. 公爵樱桃介于甜与酸樱桃之间的一种樱桃
- The mother is often the pivot of family life. 母亲往往是家庭生活的中心人物。
- The act of turning on or as if on a pivot. 转动,旋转运动在枢轴上或似乎在枢轴上转动的行为
- Gray is intermediate between black and white. 灰色介于黑色和白色之间。
- Place a pivot pin into the pivot point. 把大头针扎在旋转点上。
- In an intermediate position; neither wholly one thing nor another. 模棱两可处于中间位置; 不全是这样也不全是那样
- But the pivotal strategy must be mobile warfare. 但是转换全局的战略方针,必然要是运动战。
- Being at neither one extreme nor the other; intermediate. 中部的,居中的既不在一端,又不在另一端的; 中间的
- Study on FeRAM and its pivotal integration process. 铁电存储器及其关键集成工艺。
- The gun is pretty much the pivot of their attack. 机枪作为他们的进攻的支点表现出色。
- The father is often the pivot of a family. 父亲往往是家庭生活的中心人物。
- The intermediate gear on the car has a problem. 这部车的中速档出了毛病。
- For Haier, logistics management has a pivotal role. 对于海尔来说,物流管理有着举足轻重的作用。
- The adaptable Indian rhino is intermediate in size. 适应性强的印度犀牛是中等体型的。
- Because her job had been the pivot of her life, retirement was very difficult. 因为她的工作一向是她生命的支柱,所以退休后日子很不好过。