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....
...the texture and colour of the skin, the contours of the body...皮肤的肌理和颜色，身体的轮廓I cradled my video camera nervously on my lap, but its cold contours did nothing to comfort me.我紧张地把摄影机架在大腿上，但是它冰冷的外形并没能给我任何安慰。Note that the...
The diamond towns are gradually being reclaimed by the desert...这些钻石城镇正逐渐重归沙漠。This necessitates subdivision of the area to be reclaimed.这就必须划分要改良的面积.Estonia reclaimed its independence and seceded from the Soviet Union.爱沙...