yule log
noun [ C ] uk/ˈjuːl ˌlɒɡ/ us/ˈjuːl ˌlɑːɡ/
圣诞节原木形巧克力蛋糕
a cylinder-shaped chocolate cake, eaten at Christmas, that is decorated to look like a log (= a thick piece of wood from a tree)
US圣诞节原木（指圣诞前夜放入炉中燃烧的大原木）
a large piece of wood, usually burned on Christmas Eve