纳米金属微粒的颜色和金属块不一样。
Nanoparticles of metal do not have the same colour as that metal does in bulk.
该系统用于排烟,任何获得的金属微粒都将回炉。
The system is intended for smoke removal. Any obtained metal particles will go back to the furnace.
看起来是一些沿特定路径移动的金属微粒。
They seem to be metal particles that move along certain paths.
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