materials深度解析
obsolete词根解析？
obsolete词根解析？
！obsolete词根的派生词是obsoleteness，n. 废弃
Meanwhile, the lack of naphtha raw materials and the obsoleteness of production facilities and equipment will also affect China#39s aromatics production capacity.同时，石脑油原料不足以及装置工艺设备老化等因素也将影响国内芳烃产能的正常发挥。