castle in the air
n. 空中楼阁, 白日做梦
例句与用法：
He is building castle in spain among his book.
他埋头于书本中想地天花乱坠。
词形变化：
动词过去式: castled |
动词过去分词: castled |
动词现在分词: castling |
动词第三人称单数: castles |
空中楼阁
What he is talking about is just a castle in the air.
他所谈论的一切, 只不过是空中楼阁。
castle in the aircastle in the airn.1.■空中楼阁,白日梦,想入非非的计划
castle in the air1.■不能实现的计划(或希望);空想,幻想,白日梦 (常与build连用)[亦作air castle, castle in Spain]