N-COUNT (标志边界、崎岖路径、山顶或纪念某人的)石堆，石标 A cairn is a pile of stones which marks a boundary, a route across rough ground, or the top of a mountain. A cairn is sometimes also built in memory of someone. (标志边界、崎岖路径、山顶或纪念某人的)石堆，石标