future expansion短语⁴⁶⁷⁰⁴ 基本例句 un.将来发展；🌏有无扩展意向；未来的拓展；扩展性 The world ethylene production capacity status, the future expansion capacity prediction, the ethylene stocks analysis, and the ethylene technical advances were reviewed. 阐述了世界乙烯产能需求现状、近年扩能增产预测、乙烯原料分析以及乙烯生产的技术进展。 cnki