Her lungs were laboring for air by the time she laid the cloth aside.

Bowman's lungs were laboring as if he were on the top of Everest.

His lungs labored to breathe air suddenly thicker than silt.

His lungs labored against the pressure of the water.

Yet never have my heart and lungs labored with such desperate necessity as they did that terror-filled morning.

My lungs labored like a frantic animal in a giant's fist.

Neelix's single lung labored for air, but he didn't dare show weakness, not now.

His lungs labored; his heart pounded as if it were about to burst.

His lungs were laboring a little for air.

The lungs of the dead man were still laboring, forcing in and out the air the dead man's muscles needed for their work.