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- Several production methods, application and market demands of methy isopropyl ketone were introduced. 介绍了甲基异丙基酮的生产方法、应用、市场需求。
- Characteristic, synthesize technology and market, and production actuality and development trend of methyl isopropyl ketone were introduced. 介绍了甲基异丙酮的性质、合成技术、国内市场和生产现状及发展建议。
- The properties manufacture technology of polysulfide sulphone and polysulfide ketone were descussed,the applications about it are described. 综述了聚硫醚砜，聚硫醚酮的性能，制造工艺，介绍了应用领域。
- Improvement of synthesis process of methyl isopropenyl ketone was introduced,and the yields in different temperature was compared. 对甲基异丙烯基酮的合成工艺进行了改进,比较了在不同温度下,对醇酮中间体和脱水反应收率的影响。
- Methyl isobutyl ketone was used to be extracting solvent .The interference of the matrix was corrected effectively and the results obtained are satisfactory. 采用甲基异丁基酮萃取富集后,消除了基体的干扰,使分析结果准确可靠。
- The structures of cyclic aryl ether ketone were determined by using the technique of matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS). 通过基质辅助激光解吸电离飞行时间质谱对其环状结构进行了表征。
- Unfortunately he won't be here tomorrow evening. 可惜的是他明晚不在这儿。
- He has a yen to be alone in a boat. 他渴望独自待在一条船上。
- It is necessary that he be sent there at once. 有必要马上派他到那里去。
- The reaction of 2-alkyl benzimidazolium iodide with alkenyl magnesium haloride and the reaction of 2-alkenyl benzimidazolium iodide with Grignard reagent were studied, a new synthetic method for unsaturated ketone was provided. 对2位取代的苯并咪唑盐与烃基为不饱和取代基的格利雅试剂的加成-水解反应及由2位带不饱和取代基的苯并咪唑盐与烃基为饱和取代基的格利雅试剂的加成-水解反应进行了研究，提出了不饱和酮的新合成方法。
- I think most of these obstacles can be surmounted. 我认为这些障碍大多数都是可以克服的。
- I think the work can be completed ahead of time. 我认为这项工作能提前完成。
- He likes to be sure of his bodily comforts. 他注重身体上的舒适。
- At this rate we won't be able to afford a holiday. 照这样下去，我们不会有时间／钱去度假的。
- Roughness of the skin can be caused by bad diet. 饮食不好可能引起皮肤粗糙。
- In order not to be late, she cut across the fields. 为了不迟到，她抄近路穿过田野。
- Stress can be the undoing of so many fine players. 紧张可能是这许多优秀选手失败的原因。
- The method seems good but it needs to be tried out. 这个方法似乎不错，但需要试验一下。
- Let your yea be yea and your nay be nay. 如实说你的想法。
- Don't be unduly worried about the exam. 不要过分担心考试的事。
