Through descriptive and quantitative analysis, this paper proves that graded teaching on internet with learner-center is the trend of innovation in college English teaching.

网络分级教学是对传统的以“书本加大班、教师为中心”的大学英语教学模式的革新。

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The paper will be focused on examining the theory of distance learning circle with learner as the center, interactions theories of distance learning and distance learning models.

本文重点论述了以学生中心的远程学习圈理论、远程学习的交互理论和远程学习模式。

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Environmental groups have applauded the project. Howard Learner is executive director of the Environmental Law and Policy Center, which advocates for the development of eco businesses.

VOA: standard.2010.02.15