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- N butyl 2 ethoxy thioacridone was prepared from o chloro benzoic acid and p phenetidine by means of Ullman reaction,cyclization,N alkylation and sulfurization. 以邻氯苯甲酸和对乙氧基苯胺为原料,经过胺的苯基化、二芳胺的环化、N-烷基化、硫代化反应合成了N-丁基-2-乙氧基硫代吖啶酮。
- The synthesis of butyl,2-etheylhexyl,decyl and dodecyl methacrylates by ester interchange was studied.A suitable system of catalyst and inhibitor was obtained. 采用酯交换工艺,有机锡为催化剂,进行了甲基丙烯酸丁酯、甲基丙烯酸-2-乙基己酯、甲基丙烯酸正癸酯、甲基丙烯酸正十二醇酯等高碳烷基酯合成反应过程的研究。
- Let the tea leaves steep in boiling water for five minutes. 让茶叶在滚开的水中浸泡五分钟。
- Each of us partook of a cake and a cup of tea. 我们每人吃了一个饼和一杯茶。
- I'd like to place an order for some tea with you. 我想从贵公司订购一些茶叶。
- A nice cup of tea will soothe your nerves. 一杯好茶可以使你的心绪平静下来。
- Do you take milk and sugar in your tea? 你的茶里要加牛奶和糖吗?
- Must you dash off? Why not stay for a cup of tea? 你一定要急急忙忙走吗?为何不留下喝杯茶呢?
- We have tea at four o'clock in the afternoon. 我们在下午四点钟喝茶。
- She offer me tea in her best cup and saucer. 她用她最好的茶杯和茶碟请我用茶。
- I wouldn't marry him for all the tea in China. 有天大好处我也不嫁给他。
- I wouldn't say no to a cup of tea. 我是不会拒绝一杯茶的。
- Will 2,000 dozens be enough for selling? 两千打够卖吗?
- I will beware of strong tea at night. 我要注意晚上不喝浓茶。
- The counselor bilked his clients out of$2 million. 那位顾问从他的顾客那里骗取了200万美元。
- Coffee and tea are mild stimulants. 咖啡和茶都是温和的兴奋剂。
- The merchant had received a shipment of tea. 这个商人收到了一船茶叶。
- The spout of the teapot is jammed by tea. 茶壶的壶口被茶叶堵住了。
- Every afternoon the baby takes a nap for 2 hours. 每天下午宝宝都要睡两个小时。
- When I drink tea, my glasses mist over. 我喝茶时眼镜蒙上了一层水汽。
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