神奇的世界This DIY "camera" will let you see a magic1 world. The light enters the dark space through a tiny hole (小洞) in the tube2, and the pictures will be upside down.
21世纪报社版权所有,未经书面授权,禁止转载或建立镜像。 主办单位:中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号