从东面进入公园,左边第三条长凳就是。
It was the third bench to the left as you enter the park from the east.
突然,汤姆的左边出现了一条蛇。
墙的最左边是给新来的人的,有一条直上岩壁的路。
The far left of the wall is for newcomers, which has a straight path up the rock wall.
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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