《21世纪大学理工英语（学生用书3）》力图定位在通用英语与学术英语之间，向专门用途英语过渡，兼顾职业英语的现实需要。
将满足理工科学生学业、专业和职业需求，对接英语学习的工具性和资源性价值目标，培养批判性思维、跨文化素养和科学素养，突出读写训练、提高综合语言应用能力。
每个单元由3个部分构成。
第一部分，以情景化听力任务为驱动的词汇扩展练习；
第二部分，以知识小测验为导入方式的阅读理解任务；
第三部分，以第二部分文章相关段落的语言特点为范本，进行相应写作练习。

Unit 1 Climate Change
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXTA Global Climate Change: What You Need to Know
TEXT B The False Alert of Global Warming
PART III Grammar & Writing
Assignment 1
Assignment 2
Unit 2 Smart City
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXT A Smart Cities: 6 Essential Technologies
TEXT B Key Challenges of Smart Cities & How to Overcome Them
PART III Grammar & Writing
Assignment 1
Assignment 2
Unit 3 Population and Society
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXT A Population Decline Is Bad for Us
TEXT B Population and Sustainability: Can We Avoid
Limiting the Number of People
PART III Grammar & Writing
Assignment 1
Assignment 2
Unit 4 Information Technology
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXT A 5G and Wi-Fi 6: What's the Difference, and Where Do They Belong on Campus
TEXT B Stronger Cybersecurity Laws for the Internet of Things
PART III Grammar & Writing
Assignment 1
Assignment 2
Unit 5 Nature and Resources
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXT A Is It Important to Conserve and Protect Biodiversity
TEXT B Why Are Tigers Endangered
PART III Grammar & Writing
Assignment 1
Assignment 2
Unit 6 Learners' Autonomy
Learning Objectives
PART I Vocabulary & Watching
PART II Reading
TEXT A The Rise of Online Classes After COVID-19
TEXT B Why Is Traditional Classroom Learning Better than
Online Courses
PART III Grammar & Writing
Assignment 1
Assignment 2