The opposite angles of a quadrangle intersect each other.

In physics, when a particle and an antiparticle come into contact, annihilation occurs.

In physics, it is said that when matter and antimatter come into contact, they undergo annihilation.

We visited a traditional shindenzukuri building with a Nishi-no-Tai.

Could you attend the meeting on my behalf?

His dynamic performance captivated the audience.

He is an expert in fluid mechanics.

I am majoring in parasitology at university.

He is an expert in parasitology and conducts many researches.

He is a famous osteologist, studying many fossils.