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。

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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。

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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.

要解除症状和控制痛苦，医生也许使用针或一支稀薄的管排泄在胸口或腹部加强了的流体。

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Then a chest X-ray showed that her left lung had collapsed, and her chest was filled with fluid.

NEWYORKER: Letting Go

The parents of three-year-old Jack Casey from Bridgend said the lining of his lungs was accidentally punctured as he was having fluid drained from his chest when he was seven months old.

BBC: Rachael Puaca and Christopher Casey

Luke collapsed on 6 April with "minimal cardiac output" and a "large volume of fluid" was found on his right chest.

BBC: Luke Jenkins death partly due to 'low staffing' levels