redefines

this paper draws on the results of previous studies, redefines the study object and category, and selects several tax items to study in depth which account for a large proportion in petroleum resource exploration.

本人在借鉴前人研究成果的基础上，对研究对象和范畴进行了重新界定，选取了在石油资源开发活动中占有较大比重的若干项税费项目进行细致具体的研究。

it redefines the between-class scatter matrix by adding a radical basis function ( rbf). therefore, it can work better than the traditional methods.

该方法重新定义了样本的类间散布矩阵，在原始的定义基础上增加了一种径向基函数（RBF）调节类间距离，使得在选择投影方向时能更好地分开各类样本；

Backed by ten years of research, development and testing, the TOEFL iBT test redefines the way English is learned and measured.

基于十年的研究、开发和测试，托福网考重新定义了英语学习和测评的模式。