That represented 10% of revenues and that was the lowest level for the entire century -the entire twentieth century--10% of revenues.

占了收入的10%,这个比例是整个20世纪的最低水平,收入的10%

耶鲁公开课 - 金融市场课程节选

You have to limit your exposure to risky asset classes to a level that allows you to sustain those positions even in the face of terribly adverse market conditions.

你必须把手中持有的风险资产,限制在一个合适的比例水平,并且即使到了最差的市场环境下,你依旧能够承受这些风险资产

耶鲁公开课 - 金融市场课程节选