存著再看年 53:42 成为更好的你RSA John Tyndall: The Physicist Who Proved the Greenhouse Effect – with Paul Hurley
存著再看年 05:45 选择类别 Learning from smallpox: How to eradicate a disease – Julie Garon and Walter A. Orenstein
存著再看年 05:30 说地方与人 Light seconds, light years, light centuries: How to measure extreme distances – Yuan-Sen Ting
