Antioxidant tertiary butyl hydroquinone was prepared by hydroquinone and tertiary butyl alcohol.由对苯二酚与叔丁醇反应制得抗氧化剂叔丁基对苯二酚.They were good catalyst for synthesis of n - butyl cinnamate.它们是催化合成肉桂酸正丁酯的良好催化剂.A method of synthe...
Fish was unobtainable in certain sections of Tokyo.在东京的某些地方是买不到鱼的。Tickets seem unobtainable to the ordinary mortal.普通人好像根本买不到票。It would take a worldwide crisis to make food unobtainable from any source.只有发生全球性危机,才会到处买不到食...
We've had more press coverage in the last three weeks than in the usual three years.过去的三个星期里，媒体对我们的报道比往常的三年还多。We are very disappointed by the press coverage of the new car.我们对这种新型汽车的新闻报导大失所望.A small - business short...
方法: 用高速牙钻于患骨表面行钻孔术,然后继续应用MEBO治疗.Method: Drilling through the surface of the injured bone, followed by ap plication of MEBO.患者对牙钻 、 检查用的尖锐器械 、 注射器、牙医态度 、 就诊环境等均有不同程式的焦虑.Patients were generally anxious about dental drill, ...