积液还使肺变重变硬，降低肺的扩张能力。

The fluid buildup also makes the lungs heavy and stiff, and decreases the lungs' ability to expand.

youdao

积液还使肺变重变硬，降低肺的扩张能力。

The fluid buildup also makes the lungs heavy and stiff, and decreases the lungs' ability to expand.

youdao