翻译求助,翻译完加加分啊? 2:yields: ethylene yields to 84% for ethane, 38% for naphtha and 30% for gas oil may be achieved depending upon feedstock characteristics. 产率:以乙烷为原料,乙烯产率为84%;若以石脑油或瓦斯油为原料,视原料性质乙烯产率可分别达到38%和30%。 3:vent the exchanger to the atmosphere with the globe valve open on the line.(vent---放空;globe valve-球阀) 开启管线上的球阀,将换热器放空至大气。查看更多