This talk of moving to Australia is all just pie in the sky.

移居澳大利亚之说纯属异想天开。

《牛津词典》

Yes, Madam. I myself always wanted to talk to someone who has flown up in the sky with a plane.

是的，夫人。我自己呢一直希望同开着飞机在蓝天翱翔的人说话。

youdao

Find the time to check out your surroundings, talk to neighbors, watch the sky, sit with a pet, water the garden by hand, or watch your kids play in the dirt by themselves.

去找个时间，检查一下周围的环境，和邻居聊聊天，看看天空，和自己的宠物坐上一小会儿，亲手浇浇花，或者，看看你的孩子是如何开心地在泥巴里打滚吧。

youdao

"All this talk of a town center is pie in the sky, " he says.

WSJ: A City Slips as Downgrade Hits Home

It seemed a place designed for small, intimate groups that could pitch their talk against a vast sea and an even vaster sky.

WSJ: At Home in the World

At IandI's weekly gatherings, once occasions for boasting about sky-high valuations and listing plans, members now tend to talk about "how to get through the next few months, " he says.

CNN: ASIANOW - TIME Asia | Is the New Economy Dead?