只有一线希望。

There was just one small ray of hope.

《牛津词典》

仍有一线希望。

There is still a glimmer of hope.

《牛津词典》

他还抱着最后的一线希望。

He had one last hope to cling on to.

《牛津词典》

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。

耶鲁公开课 - 金融市场课程节选

Everyone would do that, no one would ever hold some other portfolio ... because you can see that this line is the lowest-- it's far--you want to get to the left as far as possible.

所有人都会这么做，没人会选择其他的投资组合,因为你们可以看到这条线是最低的-,你希望他越靠左越好。

耶鲁公开课 - 金融市场课程节选