This could be a past success as noted on your life arc or someone or something thing that brings a smile to your face.

比如你在人生轨迹图上标注的过往的成功，或能够让你微笑的某个人或某件事。

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To help you get started, visualize where you have been and where you are heading by creating a diagram of your Life Arc.

在开始之前，创建一个自己的生活轨迹图，用形象的方式展示出你之前的经历和未来的目标。

youdao

What we could also call "the narrative arc of your life" matters.

我们也可以称之为“生命叙事线。”

youdao

What we could also call "the narrative arc of your life" matters.

我们也可以称之为“生命叙事线。

耶鲁公开课 - 死亡课程节选

Since then, residents of Newtown have been dealing with the arc of life in unimaginable ways -- of death and loss, of pain and suffering, of shock and horror, of beginning to heal.

CNN: A message from beyond: Peace in Newtown

Bois d'Arc's reserve life is 14 years, though, double that of the typical Gulf oil-and-gas firm.

FORBES: Gassing Up

But individual choices have broader consequences, and a society in which young women routinely freeze their eggs could develop very different attitudes about children and the arc of a human life.

WSJ: The Ethics of Egg Freezing