nails unique
指甲独特
以上为机器翻译结果，长、整句建议使用 人工翻译 。
For more ambiguous types of waste, such as a piece of plywood with nails driven through it, the robot uses a spectrometer to recognise objects based on the unique patterns of light they reflect.
FORBES: ZenRobotics Develops a Garbage Sorting Robot
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