Pratt & Whitney has announced that it will be making further job reductions.普惠公司宣布将进一步裁员。The first and most stubborn problem was that of reductions in the number of aircraft.最首要也是最棘手的问题是飞机数量的减少。Many companies have announ...
研究了压力对溶剂脱沥青过程的影响.The effect of pressure on SDA process was studied.介绍了渣油溶剂脱沥青 - 脱油沥青气化 - 脱沥青油催化裂化组合工艺的研究及应用情况.The article introduces research and application situation of solvent deasphalting - deoiling asphalt gasificat...
an infrequent guest稀客Some words are too infrequent to be worthy of inclusion in the dictionary.一些单词的使用频率太低，没有必要收入词典。Barriers between nations are reared by slow and infrequent communication.国与国之间的隔阂是由沟通缓慢而又太少形成的....John&#...