1、Many who build castles in the air cannot build a hut on earth
想入非非者無大用。

2、My father built castles in the air about owning a boat.
我爸爸做了擁有一條船這樣的白日夢。

3、You'd better stop building castles in the air and get down to some practical work.
你最好不要再作種種空想，該踏踏實實做些事了。

4、Castles in the air cost a vast deal to keep up
空中樓閣，要有一大筆費用來維持。

5、There is more pleasure in building castles in the air than on the ground.
在空中建筑樓閣比在地上建筑更為有趣。

6、Castles in the air cost a vast deal to keep up.
空中樓閣，要有一大筆費用來維持。

castles in the air翻譯