The results obtained show that most of the PEU-PES hollow fiber membranes have asymmetric figure-type structure, which has the outer and inner double skin layers.是什么意思_The results obtained show that most of the PEU-PES hollow fiber membranes have asymmetric figure-type structure, which has the outer and inner double skin layers.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句