burn down 啥意思?求解答

1.把…夷为平地 brush up 擦亮；重新学习；复习...burn down 把…夷为平地...burn oneself out (因过劳而)筋疲力尽
4.烧毁；烧掉 Many a large and important business has been built up from small beginnings.burn down 烧毁；烧掉...The building was burnt down and only ashes were left.