1. Multiple researches have indicated that facial averageness, symmetry and sexual dimorphism are three main biological factors that influence facial attractiveness. 众多研究表明，面孔的平均化、对称性和性别二态性是影响面孔吸引力的三个主要生物学因素。
2. Multiple researches have indicated that facial averageness, symmetry and sexual dimorphism are three main biological factors that influence facial attractiveness. 众多研究表明，面孔的平均化、对称性和性别二态性是影响面孔吸引力的三个主要生物学因素。
