图示：胸膜下肺小叶间可见黑色条纹(碳末沉着)
碳末沉着是由于生活在染污严重的工业区长期吸入含碳物质后沉积在肺而形成的，对机体的影响较小。
The black streaks seen between lobules of lung beneath the pleural surface are due to anthracotic pigment. This anthracosis of the lung is not harmful and comes from the carbonaceous material breathed in from dirty air typical of industrialized regions of the planet.