бот., лес.
концентрические слои древесины, по числу которых можно определить, сколько лет дереву.
"Life ought to be a struggle of desire toward adventures whose nobility will fertilize the soul." Rebecca West
"Work is much more fun than fun." Noel Coward
"To affect the quality of the day, that is the highest of arts." Henry David Thoreau
"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison