He has inflammation in his foot.

When you use that distal demonstrative, it indicates that what the speaker is pointing to is far away.

This laboratory has the latest centrifuge.

My car has stalled and I'm in trouble.

I separated the sample using a centrifuge.

I asked the teacher for a postponement of the exam.

The meeting was postponed to next week.

My mother has hyperopia, so it's hard for her to see things up close.

He gave a speech at the banquet.

Exercising every day in this hot summer is really tough.