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...
滑雪者在选择购买保险的问题上应该尤其慎重。Skiers should be particularly choosy about the insurance policy they buy.总统今天突然去看望了两位享受医疗保险的病人.The President paid today a surprise visit to two Medicare patients.必要时，最保险的办法就是凭直觉判断。When necessary, ins...
This paper investigates the integrable inhomogeneous generalized Heisenberg ferromagnet model by using the prolongation structure theory.摘要利用延拓结构研究了可积的非均匀推广的海森堡铁磁链方程.Bohr's unposted letter was written in response to...
Objective To investigate the therapeutical effect of uvula - preserving uvulopalatopharyngoplasty ( UPPP ).目的观察保留悬 壅 垂腭咽成形术的临床效果.If this is the tongue, then that must be the uvula.如果这是舌头, 那么那个一定是小舌头.Objective To explore ...
We have changed the course to make it more challenging.我们改了课程以使其更具挑战性。He left a note at the scene of the crime, challenging detectives to catch him...他在犯罪现场留了个条儿，向警探挑衅。I'm ready to do all those things which are more...
在冰岛的时候他说他是巩特尔的侍从!He even introduced himseIf in IceIand as Gunther's servant!这样一来, 冰岛的食物倾向于清淡.As a result, Icelandic dishes tend to be bland.而韩国银行的状况也要比冰岛的稳定.Korean banks are also in a less precarious position than I...
拥挤的人群和喧闹的噪音可能会让游客有些茫然不知所措。Sightseers may be a little overwhelmed by the crowds and noise.塞巴斯蒂安先生一脸茫然地看着男孩儿们。Mr. Sebastian was looking at the boys with a bemused expression.他边说话边茫然地打量着房间，心不在焉的样子。He looked vaguely around t...
This was a fiendish act of wickedness.这是极其恶毒的行为。Wickedness does not go altogether unrequited.[谚]恶有恶报.I have sent a cable describing the wickedness of that infamous organization.我发了个电报,报道了那个臭名昭彰的组织的罪恶....