Why isn't this random color method working?

为什么这不是随机颜色法工作吗？

youdao

There are several errors in temperature measurement by using two-color method.

柴油机燃烧温度测量方法之一的双色法测温存在着一系列误差来源。

youdao

Methods: the polysaccharide was extracted with ethanol and the polysaccharide content was wired by UV spectrophotometry phenol -sulfuric acid color method.

方法：采用乙醇浸提法提取多糖，紫外分光光度苯酚-硫酸显色法测定粗多糖含量。

youdao

Dye, ink and paper tend to be more expensive for this method of printing than with normal color printers.

FORBES: Ten O'Clock Tech: Point, Shoot, Print

Commonly, the color of the meat is wrongly used as a method for indicating whether or not the meat is cooked.

WHITEHOUSE: Food Safety Week Kick Off

IBM's researchers have also patented a related nano-patterning method that uses fluorescent spheres that can take the color red, blue or green.

ENGADGET: IBM brings the fight to counterfeiters with nano-sized authentication methods (video)