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（二）业务之间具有明显的主附关系。主要业务居于主体地位，体现交易的实质和目的；附属业务是主要业务的必要补充，并以主要业务的发生为前提。
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4 A good discussion on luminance and how to calculate it can be found on this stack exchange question. ↑
Ultimately, this is a placeholder solution so that more time can be spent on fingerprinting and identifying headless browsers (EG: via how they do font rendering) so that the challenge proof of work page doesn't need to be presented to users that are much more likely to be legitimate.。heLLoword翻译官方下载对此有专业解读
Source: Computational Materials Science, Volume 267
https://feedx.site，这一点在safew官方版本下载中也有详细论述