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- Keywords fluoroaniline;acetylation;2 chloro 4 fluoroaniline;chlorination; 氟苯胺;乙酰化反应;4氟2氯苯胺;氯代;
- 2 chloro 4 fluoroaniline; 4氟2氯苯胺;
- 4 Chloro 4,5 dimethyl 1,3 dioxolan 2 one was synthesized from 3 hydroxy 2 butanone by acylation and cyclization, the yield was above 86%. 以羟基丁酮为原料,经酰化、环合等步骤合成医药中间体4氯4,5二甲基1,3二氧杂环戊烷2酮,合成收率达86%25以上
- Subtract 3 from 7 and you have 4. 七减三得四。
- Add up 3, 4 and 5 and you'll get 12. 把三,四,五相加,总数是十二。
- Keywords dichloronitrobenzene;2 chloro 4 fluoronitrobenzene;4 chloro 2 fluoronitrobenzene;fluorization;gas chromatographic analysis; 二氯硝基苯;2-氯-4-氟硝基苯;4-氯-2-氟硝基苯;氟代;气相色谱分析;
- The farmer paid 3 laborers to gather the crop. 农场主雇佣3名工人收割庄稼。
- These fish vary in weight from 3 lb to 5 lb. 这些鱼的重量从3磅到5磅不等。
- He lives 3 miles away from here. 他住在距离这里三英里的地方。
- I'm tied up in a meeting until 3 pm. 我开会直到下午三点钟方可脱身。
- Mr. and Mrs. Jones have 3 daughters. 仲斯夫妇有三个女儿。
- The beam has a thickness of 3 inches. 这根梁厚3英寸。
- The government hopes to hold salary increase to 3%. 政府希望将工次增长率控制在3%25。
- The horse racing is to be held at 3 p.m. tomorrow. 赛马比赛将于明天下午3点举行。
- We ordered 3 cases of soda for the party. 我们为晚会定购了三箱苏打水。
- Above term only apply to dorsa above 3,000 bales. 以上条件，仅适用于三千捆以上的订单。
- The farmer paid 3 labourers to gather the crop. 农场主雇佣3名工人收割庄稼。
- His orchards bring in$3,000 a year. 他的果园每年获利3000美元。
- Let us label each vertex with a 4 or 3 accordingly. 我们给每一个顶点相应地标上4或3。
- Add 3 heaped teaspoons of sugar. 加满满的三匙糖。
