青蛙的思考....上帝请笑吧.

ranchgirl

你还是先学学英语吧，还stop argue 呢。。

俺没学过概率，怎么了，如果简单，你就在这里给解释清楚一个，

过2小时来看，解释清楚了服你
莉莉 发表于 2009-12-14 20:42

haha, I don't need you 服俺

Thanks!

ranchgirl

so many people have explained so clear upstairs.

sigh!!!!!!!!!!