He knew how the traffic congested at the junction of Seventh Avenue and Forty-second Street.他知道在第7街和第42街交叉处交通是多么拥挤。In the seventh paragraph, the author point out the deficiency and faultiness of this paper.第七章指出了本文工作的不足和...
液化气芳构化生产三苯工艺,属于石化领域轻烃芳构化技术.Product triphen in GLP is light hydrocarbon aromatization technique in A petrochemical field.利用等温固定床反应器研究了直馏汽油芳构化改质催化剂的结焦失活规律.The coking and deactivation of virgin naphtha aromatization catalys...