These plants have a 2-year 'growth cycle'. [=the plants live and die within two years]
The water is 'cycled' back into/through the system after it has been used.
We have to wait for the dishwasher's wash and dry 'cycles' to end.
(..) and they know that they're close to water. After many hundreds of miles they've arrived. The lives of these elephants are dominated by the annual rhythm of wet and dry, a seasonal cycle created by the sun. At the southern end of the earth, after four months of total darkness, the sun once more (..)2006 TvShow: Planet Earth Title: From Pole to Pole Season: 1 Episode 1