During this formative period, graduates are no longer in the home or at the university.

在这段逐渐成形的时期，毕业生不再呆在家里或学校。

youdao

The interval may be assumed to have been a major formative period in his life: he was 21 years old when it began, 31 when it concluded.

但是这段时间可以被认为是一个人的成形时间(formative period)：开始于他21岁，终止于他31岁那年。

youdao

It was in a number of ways a formative period, perhaps the formative period in European history.

ECONOMIST: Medieval history

The task of re-reading Muslim history, specially the earliest years of the post-Prophetic period, is not one of retrospectively reading our standards into what was narrated in the formative period, but finding clues in that narrative to explain the subsequent development of Muslim politics into our time.

CENTERFORSECURITYPOLICY: Muslim-on-Muslim Violence

They spent 10 years in the U.S. during a formative period of their lives, exhibiting normal behavior for first-generation immigrants, said Mitchell Silber, a former intelligence official in the New York Police Department.

WSJ: Homegrown Terror Threat Appears to Be Rising