Before the next boom gets under way, the Fed needs a credible commitment to limiting leverage and raising interest rates and doing what is necessary to shock people out of cloud-cuckoo land.

在下一个繁荣时期开启之前，美联储需要做出可靠的承诺：限制杠杆率、提高利率、并采取必要行动将人们从乌托邦的幻境中惊醒。

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Completely, he's living on cloud cuckoo land if he thinks that's a sustainable solution to the crisis.

BBC: Nick Clegg interview

The Lib Dems have declared in recent weeks that scrapping the 50p rate is "cloud cuckoo land" (that was Chief Secretary to the Treasury Danny Alexander) and "impossible" (Vince Cable).

BBC: The UK's 50p rate: Tax or symbol?

This may sound like the stuff of cloud-cuckoo land, and none of it has been tested yet.

ECONOMIST: Aerobiology