Under the optimum condition the yield of isopropyl cyclopropane carboxylate is 92 %.在最佳反应条件下,环丙烷羧酸异丙酯的产率达92%.Isopropyl p - hydroxybenzoate was synthesized with toluene - p - sulfonic acid as catalyst.以对 甲苯 磺酸为催化剂合成了尼泊金异丙...
It was unfair to judge her on such a brief acquaintanceship.你刚认识她就对她作出评价，这是不公平的。This settled the probability of acquaintanceship.这样就有了相识的可能.Maybe we are the most acquaintanceship stranger on the world.变成最熟悉的陌生人! 放弃也是一种美!...
However, embrittlement occurs in some metals at elevated temperatures and pressures.但是, 当温度和压力升高时,某些金属会脆化.The bank is worried about mounting inflationary pressures.银行对日趋加大的通货膨胀压力感到担忧。Excessive energy is also required to ...
The AC complex impedance method is widely used to charactrize electronic materials.ac复阻抗方法已广泛地用于表征电子材料.A new Capacitive - Gap - Coupled ( CGC ) band - pass filter based on SIR ( Stepped Impedance Resonators ) is presente...