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...
He had actually left the company a year before the rumpus started.实际上，在争论开始一年前他就已经离开公司了。They kick up a rumpus and throw things at each other.他们吵了起来并互相朝对方扔东西。to cause a rumpus引起骚动...
They just rolled about on the floor punching each other like schoolboys.他们像小学生一样，在地板上滚来滚去，互相挥着拳头揍对方。...a group of ten-year-old schoolboys.一群 10 岁的男学生They just rolled about on the floor punching each other like schoolboys...
One of the men shone a torch in his face...其中一名男子用火把照着他的脸。He has always carried a torch for Barbara.他一直单恋芭芭拉。The torch can bring higher arc voltage with lower fluctuation by elongating the arc.该喷枪能够提高电弧电压并减小电弧电压波动.Hellfi...