Please listen carefully to his story.

I doubted what I heard when he spoke.

The Edo oil shark is a type of shark that lives in the deep sea.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Well then, I'm off.

I was fed up with his incessant talking.

He completely ignored the problem.

The tail cutting of a lizard is done as a part of self-defense.

He overcomes difficulties like a lizard's tail cut, which is an alternative form of 蜥蝪の尻尾切り.

The Paleolithic is the first era of human history.