Thus , this reduced temperature of reaction and increased the rate of acetophenone.降低反应温度,提高了苯乙酮的收率.Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法....
Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Thus , this reduced temperature of...
康妮在学校表现很好，以优异的成绩毕业了。Connie did well at school and graduated with honours.加扎以优异的成绩获得了三级荣誉学位。Gazza finished a creditable third.这种酒突出显示了南非产葡萄酒优异的性价比。This wine highlights the quality and value for money of South African wine...
关于他的爱情生活,他们散播了许多不堪的闲言闲语.They spread a lot of tacky gossip about his love life.他到处散播谣言.He buzzed the rumour everywhere.不要散播流言,破坏我的名誉.Don't blacken my name by spreading rumors....
信写好后把它装进空白信封里封好。Write your letter and seal it in a blank envelope.当他们判定我们有罪时，我的脑子顿时一片空白。When they found us guilty, I just went blank.用铅笔向上短短地勾画几道来填充空白。Fill in gaps by using short, upward strokes of the pencil....
I answered the phone and this voice went, "Hello? Is that Alison?"我拿起电话，就听到这个声音：“喂？是艾利森吗？”A moment later, Cohen picked up the phone. "Hello?"过了一会儿，科恩接起电话。“喂？”Hello Freddy, it's only me, Maxine.你好，弗蕾迪！是我，玛克辛。...
They had asked Hong Kong for permission to put into port there.他们请求香港允许他们在那里入港停留。He got permission from his commanding officer to join me.他得到指挥官的许可来与我会合。We are grateful to you for permission to reproduce this article.非常感...
Other causes of migraine are VDU screens and strip-lighting.偏头痛的其他诱因还有电脑的视频显示器和灯管照明。These symptoms are particularly associated with migraine headaches.这些症状尤其与偏头痛相关。I'm getting a migraine.我得了偏头痛。...
Unlike many other poor unfortunates, I do have a job.我同许多不幸的人不一样, 我是有工作的.I also have my patients, and then, too, I have some whom I call my unfortunates.首先我有他们称为病人的病人, 其次我还有我称为不幸的人的病人....