In addition, the small genetic distance between P.albina and P.nigra (0.013) suggests that they appear to be subspecies with the main difference in shell color.是什么意思_In addition, the small genetic distance between P.albina and P.nigra (0.013) suggests that they appear to be subspecies with the main difference in shell color.在线翻译_英语_读音_用法_例句