报道以呋喃甲醛和苯乙酮为原料,氢氧化钠为催化剂,采用超声波辐射合成糠叉乙酰苯的方法.With furfural and acetophenone as raw materials - furfurylideneacetophenone was synthesized by NaOH as catalyst under ultrasonic irradiation....
他的哈气悬浮在自己面前。His breath was hanging in the air before him.他声称自己可以悬浮在空中。He has claimed he can levitate.在乘客看来,球好象悬浮在空中.To the passengers the ball will appear to float in air....
This ability is described by polarization crosstalk or polarization - holding parameter.这种能力用偏振串话或偏振保持参数来描述.At the get - together , several boys in our class performed a group crosstalk.联欢会 上, 我们班的几个男生说了一段群口相声.The freque...