Natural language processing is the technology that allows computers to understand and generate human language.

Natural selection plays an important role in the evolution of organisms.

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

In physics, blackbody radiation is a very important concept.

Cosmic background radiation is considered evidence of the Big Bang.

He attacked the enemy using a flamethrower.

It is reported that North Korea has conducted another underground nuclear test.

He is an expert in experimental psychology.

He is spending a lot of time on experimental research.

He is facing many difficulties due to gender identity disorder.