But because fluorescent microscopes are quite large and expensive to use, the technology isn't yet widespread.

但是由于荧光显微镜体积较大价格昂贵，这种技术还未能大规模推广。

youdao

It's too expensive to use widely in industry or commerce, except for tiny amounts that go into people's mouths, wrap around their fingers, or hang from their ears.

因为过于昂贵，除了极少量的用于人们的口腔，或包裹在手指上抑或悬挂在耳根，黄金无法在工业或商业领域得到广泛使用。

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Over three quarters of respondents said that they thought it was too expensive to use, while 60% said that the effort necessary to learn how to use a smart phone wasn't worth it to them.

超过四分之三的人认为手机上网费用太高，60%嫌智能手机太复杂，不值得去费劲学习。

youdao

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

VOA: special.2011.06.18

I'm going to come back to that in a second with that, but I need to do one more example, and I've got to use my high-tech really expensive props. Right. So here's the fourth or fifth whatever we're up to, I guess fifth example.

并且我会用到我的,高科技的昂贵小道具，好，这是第四个还是第五个了？,好，我猜是第五个例子了,这是个被称为汉诺塔的问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

I think so. But video phone has been very hard to achieve. It's either been to be expensive, or too crowded, or can we use the internet to finally introduce video phone and this is different from video on-demand.

我也这么认为，但视频电话要成功很困难,它要么很贵，要么很拥堵，或者我们是否可以使用互联网引入视频电话,这与随需视频是不同的。

麻省理工公开课 - 媒体、教育、市场课程节选

Now whether clean coal will be too expensive to use no one really knows yet.

FORBES: Getting the Economics of Climate Change Entirely Wrong: Clean Coal Might Be Too Expensive To Use

As a result, they are commonly installed in places where it would be expensive to use electrically-powered signs.

FORBES: Radioactive Tritium Leaks from Nuke Plant; Also Two Million EXIT Signs

The way forward must be to make cars more expensive to use.

ECONOMIST: Jam today, road pricing tomorrow