I counted at least twenty shades of green!

I count twelve shades of green from where I stand ．

从我站着的地方抬眼望去，就可以看到十二种深浅不一的绿色。

The shades of dusk are deepening.

夜色苍茫。

Fine shades of grey streaked his dark hair

他的黑发间有几丝白发。

Research on Computer Intelligent Tutor System

计算机智能导师系统研究

Reform and practice of experimental teaching of basic course in medicine with project and tutor system

医学基础课实验教学项目&导师制的改革与实践

The Multimedia Online Tutor System Based on Internet

基于Internet的多媒体在线辅导答疑系统

An intelligent tutor system based on the blackboard model

一个基于黑板模型的智能教学系统

On Binary Tutor System-Based Accounting Education

会计专业双导师制人才培养模式浅论

Problems existed in tutor system for college nursing students and its solving measures

护理本科生导师制存在的问题及解决措施

College Student Tutor System: the Development and Innovation of College Student Education Management Working

本科生导师制：大学生教育管理工作的发展创新

Consummating the Tutor System To Improve the Quality of Graduate Education

完善导师负责制提高硕士研究生教育质量

The paper describes the design of an intelligent tutor system with agent techniques.

描述了一个应用软件Agent技术的智能CBR引导系统的结构设计。

Research Ability Education of Medical Undergraduates in Tutor System

以导师制为核心的医学本科生科研能力的培养

Implementation and Evaluation of Tutor System for Medical Students of Junior Colleges

医学专科生导师制的实施及效果评价

Real-Time and Dynamic Tutor System Based on Campus Network

基于校园网的实时动态答疑辅导系统

Discuss on the Application of Online Tutor System in the Distance Education

在线辅导系统在远程教学活动中应用的探讨

A Discussion of the Intelligent Tutor System Based on the Teaching Process

探讨基于教学过程的ITS系统模型

Should center around the professional study and establish overall tutor system;

应紧密围绕学生专业学习，全面建立专业导师制；

To Establish the Tutor System with the Characteristics of Higher Professional Education

构建有高职教育特色的导师制

Advanced features, which are less frequently used but have a big payoff for users, can be safely tucked away where they can be brought up only when needed.

而用户较少访问，但有很大的回报的高级特性可以安全地隐藏起来，在需要时进行调用。