He received training as a paratrooper.

Hajime decided to start a new project.

I like listening to music.

His speech captivated the audience.

The leaf of this tea plant is vividly green, isn't it?

His actions are showing a portent of danger.

This mutetrahedron plays a very important role in the world of mathematics.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

This is a model of a muoctahedron.

He is suffering from acquired immune deficiency syndrome (AIDS).