methods of changing properties 基本例句 改性方法 The advances in physical and chemical modification methods of phospholipids were reviewed.综述了国内外磷脂物理和化学改性方法研究的进展。 The method of sulfomethylation modification of bayberry tannin extract was investigated.研究了毛杨梅栲胶的磺甲基化改性方法。