The proposed device hasn’t yet been built. But a similar one conceived by an American physicist was tested last year.
虽然这个设计完成的装置还没有被建造出来，但是由一位美国物理学家设计的相似装置已经在去年进行了测试。
The proposed device hasn’t yet been built. But a similar one conceived by an American physicist was tested last year.
虽然这个设计完成的装置还没有被建造出来，但是由一位美国物理学家设计的相似装置已经在去年进行了测试。
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