Retroflexion palpebral , conjunctiva of visible affected part shows gules , amaranth or gray .

翻转眼睑，可见患处结膜呈红色、紫红色或灰色。

The results indicate that there were significant differences in mandarin retroflexion among different groups categorized by sex , fathers ' ethnic groups , mothers ' educational levels , and in english retroflex sounds according to different residency areas .

研究结果显示，受访者的国语卷舌音在不同的性别、父亲族群及母亲教育程度等社会因素下表现出显著差异性，而其英语卷舌音则由於不同居住地区有显著的差异。