因此,必须选择适当的馏分油,用调合法使它满足市场的要求.And optimum selection of crude types to meet market requirements by blending is necessary.C5馏分油主要来源于石油烃高温裂解制乙烯过程的副产品,随着乙烯工业的发展,乙烯废弃的C5馏分量逐年增大.另一方面,民用燃料需要量颇为可观.C 5 distillate of ethylene access...
Right now we are in the changeover period between autumn and winter.眼下，我们正处于秋冬交替的时候。He again called for a faster changeover to a market economy...他再次呼吁加快向市场经济过渡。At what is changeover enzymatic depressor basically used si...
The treaty was ratified by all the member states.这个条约得到了所有成员国的批准。After 10 years of negotiation, the Senate ratified the strategic arms reduction treaty.经过10年协商，参议院已经正式批准了《削减战略武器条约》。The new laws were written down and rati...