crown green bowls
noun [ U ] UK uk/ˌkraʊn ˌɡriːn ˈbəʊlz/ us/ˌkraʊn ˌɡriːn ˈboʊlz/
绿保龄，草地滚球（在草短而光滑的草地上进行的一种运动，参赛人滚动大球，使其尽可能接近小球）
a game played outside on very short, smooth grass, in which the players roll a large ball as close as possible to a smaller ball