去年夏天刚刚过了二个月，铈的价格涨了450%。
Over just two months last summer, prices on cerium jumped more than 450 percent.
该装置的发明人说，在太阳能反应器中利用二氧化铈的特性，是这项技术的主要突破点。
It is this harnessing of ceria's properties in the solar reactor which represents the major breakthrough, say the inventors of the device.
该机器的原型是由美国和瑞士的研究者们设计的。它利用一个石英窗和腔体将太阳光聚集到一个充满二氧化铈的缸体中。
The prototype, which was devised by researchers in the us and Switzerland, USES a quartz window and cavity to concentrate sunlight into a cylinder lined with cerium oxide, also known as ceria.
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