ET 发帖数: 10701 | 1 since there is a debate between Powerpig and me, I don't mind spending some
time to google other guys' opinion.
I don't plan to choose the best answer to favor my understanding, here are
some which make some sense. And on the other hand, I don't believe there is
anyone who ever thought about in the same way as mine - partilly, it's also
because of the enlengthed leverage.
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http://answers.yahoo.com/question/index?qid=20070328093429AANmq3J
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