Linea mamillaris

例句：

1. 1.The linea mamillaris is a thin, delicate muscle that runs along the side of the neck.
   线状肌肉是沿着颈部侧面的一条细薄而脆弱的肌肉。
2. 2. During exercise, the linea mamillaris helps to stabilize the spine and prevent injury.
   运动时，线状肌肉有助于稳定脊柱，防止受伤。
3. 3. In some species, the linea mamillaris may be used for communication or defense.
   在某些物种中，线状肌肉可能用于交流或防御。