Therefore, methane's role on Titan may be similar to that of water on Earth - with a precipitation cycle involving clouds, rain and evaporation.
(methane's role on Titan; may be; similar to that of water on Earth) (a precipitation cycle; involving; clouds, rain and evaporation)
methane's role on Titan a precipitation cycle
may be involving
similar to that of water on Earth
clouds, rain and evaporation