So the problem of existence through time,or persistence through time, shouldn't be called the problem of personal identity,but just the problem of identity.

所以积年累月下来存在的问题，就不该叫做个人认同感的问题，而仅是认同感的问题。

耶鲁公开课 - 死亡课程节选

What's the nature of persistence of identity over time?

同一性的持存本质是什么

耶鲁公开课 - 死亡课程节选

It takes time and persistence, but it is well worth the effort for you and your audiences.

FORBES: In The Moment -Media Training

They also find evidence that flexibility is associated with lower rates of unfilled vacancies and with lower persistence of unemployment over time.

ECONOMIST: Working man’s burden | The

So in all those ways, we can keep this pressure up over the coming period while showing patience and persistence at the same time.

WHITEHOUSE: President Obama & Prime Minister Cameron Joint Press Availability | The White House