[color=#c51414][url=http://mfcosmos.com/] MATHS AND PHYSICS... WORLD[/url][/color]
[color=#1551b5]How moves the yoyo exerting force through the thread ... up or down ... and why ...
...with choice of two [b]"moving cameras"[/b] or none ...[/color]
- 適合年齡
- 17 – 19+
- 語言
- English (United States)
