Ultraviolet absorber UV-284 (2-hydroxy-4-methoxy diphenyl ketone 5 sulfonic acid)is obtained by synthesis from 2-hydroxy -4-methoxy diphenyl ketone,and its yellowing-resistant property on silks is investigated.是什么意思_Ultraviolet absorber UV-284 (2-hydroxy-4-methoxy diphenyl ketone 5 sulfonic acid)is obtained by synthesis from 2-hydroxy -4-methoxy diphenyl ketone,and its yellowing-resistant property on silks is investigated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句