Spending 20 minutes walking allows me to be in contact with what is season like, and what is the day-to-day change and the weather.

每天花上二十分钟走路，这让我,感受到了每个季节的不同，也感受到了每天的变化和每日的天气。

普林斯顿公开课 - 人性课程节选

It's simple whether that you walk to work, or you take 20 minutes during your lunch break to walk around the gorgeous campus or town that we are live in.

这很容易做到，无论你是走路上班，还是每天午休时花上二十分钟,在美丽的校园,或是你所在的城市转一转。

普林斯顿公开课 - 人性课程节选

If we're doing close readings we might go into that for twenty minutes, but we're not.

要是进行仔细的阅读比较,我们可能要花上二十分钟,但我们不这样做

耶鲁公开课 - 美国内战与重建课程节选