平胸类

例句：

1. 1. She's always been self-conscious about her flat chest.
   她总是对自己的平坦胸部感到不自在。
2. 2. The woman in the picture has a flat chest and is quite slim.
   照片中的女士胸部平坦，身材苗条。
3. 3.Flat chests are often associated with athleticism and physical fitness.
   平坦的胸部通常与运动能力和身体健康联系在一起。