On March twenty-second, NASA again ordered the astronauts on the linked space station and shuttle Discovery to move out of the way of another piece of debris from a rocket.

VOA: special.2009.04.01

Then as you move out to the equity markets where it's harder to price things as efficiently--large-cap stocks -there are two-fold percentage points,first to third quartile.

如果你转而观察,难以有效定价的市场,比如大盘股,第一和第三个四分位数相差2个百分点

耶鲁公开课 - 金融市场课程节选

.. The more they covary--they move together-- the less they cancel out.

共变的趋向越大。。。它们一同增减-,风险越不会抵消。

耶鲁公开课 - 金融市场课程节选