The research team faced high challenges when adapting the technology to extreme environments.

The referee booked him for a high challenge that endangered the opponent's shin.

He joked that being parentally challenged had given him a PhD in improvisation for handling life's practicalities.

I prepared intensively for the challenge exam so I could earn credit without taking the full course.

When he was stopped at the gate, he presented his challenge coin bearing the unit's emblem to verify his membership.

At the reunion, veterans proudly displayed their challenge coins and traded stories about their service.

Many students prepare for challenge exams to skip introductory courses and save on tuition.

When the power failed during the event, the staff managed to rise to the challenge and keep everything running smoothly.

At the summer fair, the Pepsi Challenges drew long lines of curious tasters eager to compare flavors.

At the company picnic, the marketing team set up a Pepsi Challenge to see which cola employees preferred.