This winter scenery is really beautiful, isn't it?

He participates in rigorous winter training every year.

His nature is very kind.

Detailed information is needed to understand the nature of that project.

I was moved by his sincerity.

His nature is very kind.

The theory of harmonic oscillators is a fundamental concept in physics.

Gender identity refers to the gender that each individual recognizes themselves as.

The use of renewable energy helps protect the global environment.

The Winter Triangle is shining in the night sky.