Sentences with Pin Down

It took some time, but the teacher managed to pin down the source of the students' confusion in the complex math problem.

It was a challenge for the teacher to pin down the key concept that the students were struggling to grasp in their literature studies.

The coach instructed the players on how to pin down the opposing team's star player during the crucial match.

Can you pin down the main idea of the paragraph in one sentence?

The treasure hunters tried to pin down the exact coordinates of the hidden treasure.

Can you help me pin down the source of that mysterious sound in the machinery?