World War II lasted from 1939 to 1945.

This is the second time he's been late. Well, they say what happens twice will happen three times.

This regular dodecahedron is a geometric shape with perfect symmetry.

This solid is called a regular icosahedron, and it is made up of 20 equilateral triangles.

My flexor pollicis brevis hurts.

He is doing special exercises to strengthen his flexor pollicis longus.

He underwent surgery due to an injury to his extensor pollicis brevis.

He injured his extensor pollicis longus.

He is doing special exercises to strengthen his dorsal interosseus muscle.

The palmar interosseus muscle is a part of the hand muscles and supports the movement of the fingers.