Facies symphysialis

例句：

1. 1. The study of human facial symmetry is essential for understanding the evolution of our species.
   研究人类面部对称性对于理解我们物种的进化至关重要。
2. 2. During fetal development, facial symmetry plays a crucial role in determining how the baby's face will look when it grows up.
   在胎儿发育过程中，面部对称性起着至关重要的作用，决定了婴儿长大后的脸型。
3. 3. In this case, the patient had a facial symmetry that was significantly different from the average.
   在这种情况下，患者的面部对称性与平均值有显著差异。