I don't think you appreciate how expensive it will be.

我想你不了解它会有多昂贵。

《牛津词典》

How expensive is it to hire an agency like yours?

雇佣一家像你的那样的机构要花费多少呢？

youdao

Up until then, I hadn't truly realized just how expensive an education can be.

直到那时，我才真正意识到教育是多么的昂贵。

youdao

I filled this room with expensive scientific equipment that I did not know how to use.

VOA: special.2011.06.18

I think that maybe some people don't think carefully enough about how expensive it is

我觉得有些人没有考虑清楚学费到底有多贵，

拿全额奖学金 - SpeakingMax英语口语达人

And that's how it actually gets to be so quiet when you have on, supposedly, these quite expensive headphones.

所以你戴上它后会觉得,周围非常安静，可想而知,这种耳机非常贵的。

麻省理工公开课 - 化学原理课程节选

There are countless post election charts and graphs that detail just how expensive our election was.

FORBES: Political Contributions by Healthcare Executives

And given how expensive it is, should that have been something -- is that fair criticism?

WHITEHOUSE: Press Briefing

Yet all we hear about is how expensive it is to buy one of the robot systems.

FORBES: We Probably Spend Too Little On Health Care (Unless You're Peter Orszag)