Research on xenotransplantation has the potential to open new frontiers in medicine.

This river has a lot of small stones.

He is always hanging out with bad friends. Truly, birds of a feather flock together.

Mr. Hidachi is my best friend.

He started a fire using a flint.

This Ishiganto was installed to pray for traffic safety.

She has heterochromia of blue and green, which is part of her charm.

I was surprised to find a centipede in the garden.

I found a stone centipede in the garden.

Mr. Koshi is my best friend.