He is working on the revision of a previously published work.

He worked all night to revise the document.

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 working on digging a tunnel.