air castle

Because of the disjoint of the theoretical and practical research of reading instruction, many theories can not be put into practice for proof-test finally. So the theory becomes an air castle without any practical applicable worth;

关于阅读教学对话的理论研究与实践研究脱节，很多理论最终难以付诸实践和接受实践的检验，理论建构成为空中楼阁，缺乏实际应用价值；

Humanity spirit will a castle in the air if man's desire cannot be satisfied.

如果人的欲望都难以得到满足的话,那么人文精神也就无从谈起.

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.

Then Ibrahim looked once more in the surface of the diamond and saw a great web like that of a spider hanging in the air round the castle.

易卜拉欣又看了一次钻石面，这回看见一张蜘蛛网似的大网悬在空中，罩着城堡。

It is out of the question for anyone to build a castle in the air.

任何人想建立空中楼阁都是不可能的.

Agricultural production is assisted is more a castle in the air.

农业生产辅助更是“空中楼阁”.

Short of perfect Regional Innovation System, National Innovation System will be nothing else but air castle.

没有健全的区域创新体系，国家创新体系无异于空中楼阁。

But your last quotation still seemed like air castle which made me failed to reach for.

只是你们上次的报价还是象空中楼阁一样让我可望而不可及.