n.

an activity that diverts or amuses or stimulates

"for recreation he wrote poetry and solved crossword puzzles"; "drug abuse is often regarded as a form of recreation"

同義詞：diversion

activity that refreshes and recreates; activity that renews your health and spirits by enjoyment and relaxation

"days of joyous recreation with his friends"

同義詞：refreshment

Computer recreations
Computer recreations
Mathematical recreations & essays
Mathematical Recreations and Essays
Computational recreations in Mathematica
Computational recreations in Mathematica.
Popular Recreations in English Society, 1700–1850
Popular Recreations in English Society, 1700-1850 by Robert W. Malcolmson
Computer recreations: Sharks and fish wage an ecological war on the toroidal planet Wa-Tor
Computer recreations: In the game called Core War hostile programs engage in a battle of bits