My itinerary is long distance.

He is immersed in the study of the light spectrum.

This spectrum is very beautiful.

This machine is used to divide light into a spectrum.

Our teamwork created a synergy that led the project to success.

Kodo is a traditional Japanese art, a ceremony to enjoy the fragrance.

The ecliptic refers to the path on the celestial sphere that the sun moves through over the course of a year.

He is known as a person who values filial piety.

He is working on digging a tunnel.

In mathematics, a variable forms part of an equation.