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...
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....
这辆车已开始向后滑动, 因为手闸不太灵.The car, whose handbrake wasn't very reliable , began to slide backwards.你戴上安全带,松开手闸.You put on your seatbelt and disengage the hand brake.手闸扳上时不可开车.Don't drive with the handbrake on....
A 40 watt bulb would be quite sufficient and would not obtrude...40瓦的灯泡完全够亮了，并且不会晃眼。...a 100-watt lightbulb.100 瓦的灯泡a 60-watt light bulb60瓦的电灯泡A 40 watt bulb would be quite sufficient and would not obtrude.40瓦的灯泡完全够亮了，并且...
Inflation is finally levelling out at around 11% a month.通货膨胀率最终稳定在每月11%左右。It inculcated universal asceticism and social levelling in its crudest form.这种文献倡导普遍的禁欲主义和粗陋的平均主义.The preliminary computation is the same as that...
CALL WHAT YOU SEE and do not be influenced by GAMESMANSHIP.宣判你所看到的,不要被花招或小动作所影响.There is also fear that his altruism may be motivated by calculated gamesmanship.还有人担心,安巴尼的利他行为可能是精心设计的花招.Making hard choices is all but imp...