现在也就是保持底线不受攻击。
But holding the line at current levels is doable — and necessary.
但是拿着在当前层的线是可行的——并且必要。
You have plenty of options for accelerating queries in a DB2 environment while holding the line on indexes.
您有很多选择可以加速 DB2 环境中的查询,同时又可保证不增加索引数。
You want to, for any given expected return, you want to minimize the standard deviation, so it's the left-most line and that means that everyone will be holding the same portfolio.
你希望,在期望收益固定的情况下,你肯定希望将标准差最小化,而这条线是最左边的线,这就意味着所有人,都愿意持有这样的投资组合。
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