cogwheel

"My friend told me there was something in the box, but I didn't know what it was yet. "

"Proper respiration is important for good health, so I make sure to take deep breaths during my morning exercise routine. "

"The medicine helped my grandmother feel better after she had the flu. "

"I stopped at the traffic lights."

"Starting tomorrow, I will wake up an hour earlier to exercise. "

"The runner was breathing heavily after the long race. "

"He still has nightmares resulting from the treatment he received from his captors."

"Her voice was distinct despite the heavy traffic."

"The bicycle's gears are a complex mechanism that converts the rider's pedaling motion into forward movement. "

"The hospital used a hyperbaric chamber to help the scuba diver recover from decompression sickness by increasing the oxygen pressure in his blood. "

"We saw the internal compartments."

"You need to behave yourself, young lady."