There are two pleurae in the chest cavity and their job is to protect and cushion the lung by secreting fluid that allows the lung to move smoothly within the chest cavity when breathing.
胸腔两层胸膜，它们通过分泌液体保护和缓冲肺脏使得肺可以随呼吸在胸腔里平稳的运动。
2
This study suggests that the recognition of these sonographic features may be more relevant and practical than ascites fluid studies, chest radiographs, tuberculin skin tests, and sputum cultures.
本研究提示这些超声特征的发现要比腹水分析、胸片、结核菌素实验和痰培养更中肯和实用。
3
To relieve symptoms and control pain, the doctor may use a needle or a thin tube to drain fluid that has built up in the chest or abdomen.