He always boasts, but in reality, he does nothing.

He has a habit of always boasting.

The Grand Duchy of Luxembourg is a small country in Europe.

The launch of intercontinental ballistic missiles has become an international issue.

He is preparing to explore the Dark Continent.

I studied Classical Chinese in university.

He is an expert in fluid mechanics.

His dynamic visual acuity as a baseball player is very excellent.

My opponens pollicis muscle hurts.

He is doing special exercises to strengthen the opponens digiti minimi muscle of his foot.