Meat and butter were prohibitively expensive.

肉和奶油都贵得买不起。

《柯林斯英汉双解大词典》

Now, new technology makes it easier, faster, and cheaper to identify and serve targeted micro-markets in ways that were physically impossible or prohibitively expensive in the past.

现在，新技术使识别和服务目标微市场变得更容易、更快捷、更便宜；这在过去是不可能实现的，或者是代价非常昂贵的。

youdao

Car insurance can be prohibitively expensive for young drivers.

汽车保险费有时高得让年轻开车人承受不起。

《牛津词典》

Until now, suitable alternatives have been either unavailable in this area or prohibitively expensive.

ENGADGET: Excluded by the UK's fiber rollout, Oxfordshire villages roll their own 1Gbps broadband service

And if they cannot find a job, they will find the cities prohibitively expensive.

ECONOMIST: But only for a select few

The route, they said, is prohibitively expensive due to China's high permit and guide fees.

BBC: The ethics of asking strangers to pay