In this paper, the contrasterror of this technique is studied, and four basic error-forms are discussed.
对该技术衬度误差的形成机理及形式进行了分析研究，并给出了四种基本误差形式。
2
In contrast, if he infers that she is not interested when she is in fact interested, then he has made an error of false negative (what the statisticians call the "Type II" error).
However, make sure that the portlet's background color has enough contrast with red, and make sure that you can still tell that it is an error message if it is not highlighted in red.