经过几十年的不懈努力，中国已经发展到一个新的阶段。

It is through decades of hard work that China has progressed to a new stage.

youdao

这是人生旅途的中间阶段，在这个阶段，人们感觉到青春的消逝，前景的逐渐狭窄，死亡的逼近。

It's the stage in the middle of the journey when people feel youth vanishing, their prospects narrowing and death approaching.

youdao

到那个阶段了吗？

Has that stage arrived?

youdao

But by looking at the stages, we pick out a space-time worm that makes up a person.

但看着这个阶段，我们联想到组成那个人的,时空虫。

耶鲁公开课 - 死亡课程节选

So you, like, read Emerson, Melville - "Moby Dick", stuff like that.

所以，那个阶段，你能读到爱默生，还有《大白鲸》的作者梅尔维尔。

写作课程比较难 - SpeakingMax英语口语达人

And finally, there is regression, which is returning to an earlier stage of development.

最后，来说说退行，意思是回归到发展的某个早期阶段。

耶鲁公开课 - 心理学导论课程节选