And then we're going to spend several weeks, or at least a week or so, talking about the nature of personal identity.

然后再用几周时间,至少一周,讨论个人同一性的问题

耶鲁公开课 - 死亡课程节选

I usually try and go for a walk at least three times a week,

我一般一周至少散步3次，

愉快的音乐庆典 - SpeakingMax英语口语达人