in cloudland

• 想入非非；(思想)进入虚无缥缈之境

in cloudland的用法和样例：

例句

1. He's got some maggot in his head.
   他在想入非非。
2. His scheme seems to me fanciful in the extreme.
   我觉得他的计划似乎完全是想入非非。