经济学是对人和选择的研究，机会成本的大小决定你的选择，稀缺性促使政府寻取正确的激励机制

1.How and Why We Read 　　2.《罗密欧与朱丽叶》（上）Romeo and Juliet - Of Pentameter & Bear Baiting 　　3.《罗密欧与朱丽叶》（下）Romeo and Juliet - Love or Lust 　　4.《了不起的盖茨比》（上）The Great Gatsby - Like Pale Gold 　　5.《了不起的盖茨比》（下）The Great Gatsby - Was Gatsby Great 　　6.《麦田里的守望者》（上）The Catcher in the Rye - Language, Voice, and Holden Caulfield 　　7.《麦田里的守望者》（下）The Catcher in the Rye - Holden, JD, and the Red Cap 　　8.艾米丽·狄金森 The Poetry of Emily Dickinson - Before I Got My Eye Put Out

John and Hank Green go over the history of the universe in a fun and exciting way. 　　Episodes include… 　　大爆炸 The Big Bang: Crash Course Big History #1 　　探索宇宙 Exploring the Universe: Crash Course Big History #2 　　太阳与地球 The Sun & The Earth: Crash Course Big History #3 　　生命 Life Begins: Crash Course Big History #4 　　进化的史诗 The Evolutionary Epic: Crash Course Big History #5 　　人类进化 Human Evolution: Crash Course Big History #6 　　迁徙与强化 Migrations and Intensification: Crash Course Big History #7 　　现代革命 The Modern Revolution: Crash Course Big History #8 　　人类世与不远的未来 The Anthropocene and the Near Future: Crash Course Big History #9 　　深入未来 The Deep Future: Crash Course Big History #10

传播学

01.什么是“游戏” 　　02.古代游戏 　　03.电子游戏的黎明 　　04.雅达利的发家史 　　05.家用游戏主机 　　06.雅达利大崩溃 　　07.任天堂的发家史 　　08.世嘉的发家史 　　09.索尼时代的游戏机 　　10.微软与联机游戏 　　11.休闲游戏&手机游戏 　　12.MMORPG游戏 　　13.卡牌游戏 　　14.桌上游戏 　　15.益智游戏 　　16.游戏心理学 　　17.体育 　　18.RPG游戏 　　19.游戏设计 　　20.PC游戏 　　21.VR游戏与未来 　　22.开放世界游戏 　　23.掌上游戏机 　　24. 输入设备 　　25.游戏节目 　　26.实况角色扮演游戏（LARP） 　　27.赌博游戏 　　28.口袋妖怪 　　29. 游戏的未来

An educational series on world history hosted by the John Green.

In 47 episodes, Hank Green will teach you anatomy and physiology! This course is based on an introductory college level curriculum, with Human Anatomy and Physiology, 9th edition, by Marieb and Hoehn as its main reference text. 　　Episodes include… 　　Introduction to Anatomy & Physiology: Crash Course A&P #1. 　　Tissues, Part 1: Crash Course A&P #2. 　　Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3. 　　Tissues, Part 3 - Connective Tissues: Crash Course A&P #4. 　　Tissues, Part 4 - Types of Connective Tissues: Crash Course A&P #5. 　　The Integumentary System, Part 1 - Skin Deep: Crash Course A&P #6. 　　The Integumentary System, Part 2 - Skin Deeper: Crash Course A&P #7. 　　The Nervous System, Part 1: Crash Course A&P #8. 　　The Nervous System, Part 2 - Action! Potential!: Crash Course A&P #9. 　　The Nervous System, Part 3 - Synapses!: Crash Course A&P #10. 　　Central Nervous System: Crash Course A&P #11. 　　Peripheral Nervous System: Crash Course A&P #12. 　　Autonomic Nervous System: Crash Course A&P #13. 　　Sympathetic Nervous System: Crash Course A&P #14. 　　Parasympathetic Nervous System: Crash Course A&P #15. 　　Taste & Smell: Crash Course A&P #16. 　　Hearing & Balance: Crash Course A&P #17. 　　Vision: Crash Course A&P #18. 　　The Skeletal System: Crash Course A&P #19. 　　Joints: Crash Course A&P #20. 　　Muscles, Part 1 - Muscle Cells: Crash Course A&P #21. 　　Muscles, Part 2 - Organismal Level: Crash Course A&P #22. 　　Endocrine System, Part 1 - Glands & Hormones: Crash Course A&P #23. 　　Endocrine System, Part 2 - Hormone Cascades: Crash Course A&P #24. 　　The Heart, Part 1 - Under Pressure: Crash Course A&P #25. 　　The Heart, Part 2 - Heart Throbs: Crash Course A&P #26. 　　Blood Vessels, Part 1 - Form and Function: Crash Course A&P #27. 　　Blood Vessels, Part 2: Crash Course A&P #28. 　　Blood, Part 1 - True Blood: Crash Course A&P #29. 　　Blood, Part 2 - There Will Be Blood: Crash Course A&P #30. 　　Respiratory System, Part 1: Crash Course A&P #31. 　　Respiratory System, Part 2: Crash Course A&P #32. 　　Digestive System, Part 1: Crash Course A&P #33. 　　Digestive System, Part 2: Crash Course A&P #34. 　　Digestive System, Part 3: Crash Course A&P #35. 　　Metabolism & Nutrition, Part 1: Crash Course A&P #36. 　　Metabolism & Nutrition, Part 2: Crash Course A&P #37. 　　Urinary System, Part 1: Crash Course A&P #38. 　　Urinary System, Part 2: Crash Course A&P #39. 　　Reproductive System, Part 1 - Female Reproductive System: Crash Course A&P #40. 　　Reproductive System, Part 2 - Male Reproductive System: Crash Course A&P 41. 　　Reproductive System, Part 3 - Sex & Fertilization: Crash Course A&P #42. 　　Reproductive System, Part 4 - Pregnancy & Development: Crash Course A&P #43. 　　Lymphatic System: Crash Course A&P #44. 　　Immune System, Part 1: Crash Course A&P #45. 　　Immune System, Part 2: Crash Course A&P #46.Immune System, Part 3: Crash Course A&P #47.