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Phun是什么？Phun是Ume大学的学生Emil Ernerfeld为自己的计算机作业而开发的一个基于物理规律的工具软件. 使用者可以随意而且轻易的创建物体，并给它们之间创建弹簧、链条等联系，重力、摩擦力、弹力、加速度等等，一切都符合物理规律. 这个软件的开发目的是为了让物理教学、研究更直观有效. 看完下文的视频你就能了解它的神奇之处了。

IMPORTANT: if you have an older Phun installed I advice you to make a clean install, that is to delete the old Phun folder completely, or at least all the *.cfg:s in it. Just uninstalling it in Windows won't do, as the settings file (g) will still remain. Windows

Phun beta 4 installer (2.8 MB) - recommended for Windows XP and earlier

Phun beta 4 zip archive (3.8 MB) - recommended for Windows Vista - extract to a directory with write access (such as My Documents or the desktop)

Linux

Phun beta 4 for 32-bit Linux, 2 archive (3.7 MB)

Phun beta 4 for 64-bit Linux包括Facebook对进入中国市场的迟疑并不是没有理由的, 2 archive (3.9 MB)

MacOS

Phun beta 4 (6.9 MB) - for Mac OS X 10.4 and later, works on both x86 and PowerPC?.

Previous versions

Old versions including the previous 3硬是深入每村每户.5 releases.

可惜还不支持中文