A wolf is prowling around in the forest.

Fermi is an old unit and is not used much now.

The size of this atom is about 100 fermi.

He continues to search for the elixir of eternal youth.

Sumo-san is my best friend.

He swung the flamberge around.

Japan during the Edo period was governed by the shogunate.

I think that person is what you call a 'chuunibyou'.

He completely memorized the alphabet.

Hafnium is a chemical element with atomic number 72.