什么一些昆虫和鱼摄入鱼藤酮会致死.Explain why rotenone ingestion is lethal to some insect and fish species.所述植物提取液可以是辣椒素、鱼藤酮.The plant extract liquid may be capsaicim or rotenone.为了优化鱼藤酮异构化制备异鱼藤酮的工艺.采用三氯化铝催化下异构化.To optimize the process o...
I consider it my duty to write to you and thank you.我认为写信向你表达谢意是我的责任。For a copy of their brochure, write to the above address.欲索取其宣传册，请写信至以上地址。Write to us direct with details of your clubs.直接给我们写信，讲述一下你们俱乐部的详细情况。...
Experiment on the transesterification of jatropha curcas oil with p - toluene sulphonic acid as catalyst was studied.实验研究了麻疯树油在对 甲苯 磺酸催化剂的作用下与甲醇发生转酯化反应生成脂肪酸甲酯(生物柴油)的情况.Isopropyl p - hydroxybenzoate was synthesized with t...
Industry has been working at developing harmless substitutes for these gases.该行业一直在努力开发一些可以替代这些气体的无害物质。The extra players, or substitutes, wait until they are called.额外的运动员或是预备去替换的人没被召唤时在里面等着.He substitutes as our teacher...
Usumbura was renamed Bujumbura when Burundi became independent in 1962.布隆迪年独立后乌松布拉改名为布琼布拉.Sierra Leone and Burundi have been designated as the first two beneficiaries.塞拉里昂与布隆迪被选定为最先两个受益国.South Africa, for instance is muc...
到目前为止，这笔账单保守估计大约为2.2万英镑。A conservative estimate of the bill, so far, is about £22,000.我的服务员麻利地撤走盘子并搁下我的账单。My waitress whipped the plate away and put down my bill.经济衰退和医疗账单逼得他们破产了。The recession and hospital bills drove th...
善意和同情心对于真正的成功是重要的主成部分.Kindness and compassion are important ingredients for true success.危崖一组构成部分多岩峭壁或岬的陡峭突兀的石块群.A steeply projecting mass of rock forming part of a rugged cliff or headland.粒化是人类认识的基础概念之一, 粒化是整体分解成部分.On ...