简直可以应用马斯克的傻X指数……

Musk developed the 'idiot index,' which calculated how much more costly a finished product was than the cost of its basic materials. If a product had a high idiot index, its cost could be reduced significantly by devising more efficient manufacturing techniques.
【 在 guoqingjie 的大作中提到: 】
: 什么东西比同重量的黄金贵？
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修改:tgfbeta FROM 125.38.176.*
FROM 125.38.176.*