It's cost is estimated at $10 billion.

它在100亿美元左右。

Hard disks cost about 15 times as much as tape.

硬盘概是磁带15倍。

And is that what makes Rolls-Royce so expensive?

劳斯莱斯高昂是因为这些原因吗？

Does it cost more than a standard shopping cart?

它比普通购物车贵吗？

It costs twenty billion dollars and took almost a decade to build.

其200亿美元 耗时近十年。

And it only costs about one fifth of the metro.

但约只有地铁五分之一。

It took three years of research and development, and it cost around $20,000 to build.

其研发历时三年，约2万美元。

That's because car batteries are expensive.

这是因为汽车电池昂贵。

I want one, but they still cost a lot.

我想要一台，可是电动车还是很贵。

Early warning system for earthquakes is expensive and also complex.

早期地系统昂贵并且极其复杂。

Its projected cost is just over 5 billion dollars mainly funded by China.

50多亿美元，主要由中国出资。

There are some models that get considerably more mileage, but they cost considerably more money.

有一些型号能够行驶更多里程, 但则更为高昂。

Launching space vehicles from its top would be much cheaper.

而从天梯顶部发射太空飞行器会更为低廉。

It sounds like it would be incredibly expensive. Has anyone actually built one?

听起来不菲啊。真有人建了这么一栋建筑吗？

So while green energy is getting cheaper, it can still be very expensive.

尽管绿色能源成本越来越低，却还是很昂贵。

The $23 million aircraft isn't collecting any scientific info.

这架2300万美元直升机并不需要收集任何科学信息。

It is affordable, sustainable, and its battery lasts for a long time.

瓦卡瓦卡灯低廉、可持续, 而且电池续航时间长。

But the money has to come from somewhere because mosquito control is expensive.

但因为控制蚊子数量高昂，这笔资金肯定会通过某种途径获得。

Optic scanners,which cost about 100,000,are the most technologically-advanced part of the process.

约100000美元光学扫描仪是垃圾处理最为先进一项技术。

It's not uncommon for a new sports stadium to cost more than a billion dollars to construct.

一个超过10亿美元新体育场并不新鲜。