The atomic weight of helium is 4.

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.

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

The use of renewable energy helps protect the global environment.

The development of fusion reactors could potentially be the key to solving future energy problems.

He is facing many difficulties due to gender identity disorder.

Gender discrimination is one of the social issues that needs to be resolved.