二分之一个证明等于 0 ！
华罗庚说：“宇宙之大，粒子之微，火箭之速，化工之巧，地球之变，生物之谜，日用之繁，无处不用数学。”
Saturday, 17 December 2011
Relaxing Piano music by Paul Collier, 10 Minute relax 2 + alpha brainwaves (06)
Such relaxing Piano music by Paul Collier,
10 Minute relax 2 + alpha brainwaves (06)
Enjoy smooth relaxing beautiful music, no words, a gentle instrumental, Take a break from your busy life
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