a long, open, level area, typically beside the sea, along which people may walk for pleasure (尤指海滨供散步用的)长形空旷平地 ■an open, level space separating a fortress from a town (要塞与城镇间的)旷地
语源
late 16th cent. (denoting an area of flat ground on top of a rampart): from French, from Italian spianata, from Latin explanatus 'flattened, levelled', from explanare (see explain)