It directly covers the lung itself, which makes extraction of the visceral pleura without subsequent damage to the lung very difficult.
它直接覆盖于肺表面，使得移除脏层胸膜而无肺损伤非常困难。
2
Including syphilis cause serious damage more visceral, can affect the heart, liver, kidney dirty, the brain and spinal cord, etc, thus showing symptoms is also very complicated.