系统复杂性是人类认识史上的重要转折点。

System complexity is an important turning point in the history of man cognition.

youdao

这是我人生的重要转折点，我需要对我的行为负责。

This is an important point in my life and I need to take responsibility for my actions.

youdao

我决定换一种职业的那天是我人生的一个重要转折点。

The day I decided to change my career was the big turing-point in my life.

youdao

The Delphic story for what it's worth marks a major turning point in Socrates' intellectual biography.

德尔菲神谕事件，不论好坏,都标志着,一个苏格拉底思想传记中的重要转折点。

耶鲁公开课 - 政治哲学导论课程节选