并尝试替换器件的中间金属纳米层，为拓展器件结构和制作方法做出一定的尝试性工作。

Try to replace the metal -nanocluster layer with different material and make some basic progress in expanding the structure and process of device fabrication .

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为什么在我的金属箍的中间部分没有黑镍这个问题，就得用上好多页纸才能回答清楚。

The complete story of why the center of my ferrule has no black nickel on it would take pages to explain.

youdao

最初它们是圆圆的金属片，中间有一个洞，这样一根绳子就可以把它们串在一起。

Originally they were round pieces of metal with a hole in the center, so that a piece of string could keep them together.

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