This paper reports a new synthetic method of nickel borate acylate.本文研究了以碳酸镍合成硼酰化镍的新方法.Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.收率相对于丙二酸二乙酯达到了80...
在交通拥堵的雨天里踩刹车绝不是什么好玩的事。Braking in the wet in heavy traffic is never fun.雨天会给枯草热患者带来欣喜，减轻他们的痛苦。Rainy weather brings blessed relief to hay fever victims.他们更喜欢雨天。They liked it better when it rained....