數理情色
甚麼是『數理情色』？這是個以輕鬆手法討論科學知識的blog，當然也是吸引人來看我的blog的綽頭名稱！
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Wednesday, June 04, 2008
自然的聲音
風聲, 鳥聲, 蛙聲 (要很靜心的聽), 在Zion National Park.
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