另外,这种设备也比较昂贵而且噪音很大,相当难控制。
Plus, the device is expensive, noisy, and notoriously difficult to control.
而且稀土也不是非常昂贵。 2009年,全球各种原料稀土的总销售额低于20亿美元,这个市场规模仅相当于钯的一半,或是金的1%。
In 2009, global sales of all raw rare earths combined came to less than $2 billion -- half the market for palladium alone, and 1 percent of the market for gold.
此实验性技术还需要很长时间来测试,而且花费也相当昂贵。
This experimental technology also takes a long time to test, but also spent quite expensive.
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