N-COUNT
				黑洞洞的大厦(或大房间)
				If you describe the inside of a building or a room as a cavern, you mean that it is very large and, usually, dark or without much furniture.
例句
						The kitchen now is a dark cavern, with an antiquated black stove in a corner.
						厨房现在黑洞洞的,角落里有只破旧的黑色炉子。