pixel[1] = pixel[1] 0.0031308f ? 1.055f * powf(pixel[1], 1.0f / 2.4f) - 0.055f : 12.92f * pixel[1];
17. What is a commission rate? Commission rates are typically based on a percentage of the total sale and in some cases can also be a flat fee for each transaction. The rates are set by the merchant.
，更多细节参见旺商聊官方下载
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（二）采取预收款方式提供建筑服务；