These animals don't have a sophisticated brain to recognize the slight differences between human facial features.

这些动物没有复杂的大脑来识别人类面部特征之间的细微差别。

Scientists analysed their faces and discovered that those with more symmetrical facial features were more inclined to be hawks.

科学家分析了他们的脸，发现那些左右脸更加对称的人更加倾向选择成为鹰派。

Facial features are distorted in pain.

面部扭曲，痛苦不堪。

Facial hair can be used to enhance a man's look and facial features.

络腮胡可以提高男人的外观和面部特点。

Putin is unmistakably Russian, with chiseled facial features and those penetrating eyes.

他刚硬的面部线条和具有穿透力的目光表明他是纯种俄罗斯人。