他在经历一段非常艰难的时期。

He was going through a very difficult time.

《柯林斯英汉双解大词典》

这是一个充满困难和挫折的时期。

It was a time fraught with difficulties and frustration.

《牛津词典》

那是对该产品需求最旺的时期。

It was a time of peak demand for the product.

《牛津词典》

Beginning in the late 1630s at the moment in which Lycidas is being written, Milton is becoming increasingly radical.

在17世纪30年代的晚期,即的创作时期，弥尔顿正变得愈发的激进和极端。

耶鲁公开课 - 弥尔顿课程节选

and many of the anonymous poets from the old English period that I studied in my graduate school days.

还有许多我在大学里学过的古英语时期的匿名诗人。

我的专业 - SpeakingMax英语口语达人

These materials were transmitted and developed by different circles within Israelite society over centuries, and they crystallized at different times.

这些资料被传播发展,几世纪来，由以色列社会中的不同圈子，它们曾在不同的时期都非常明确。

耶鲁公开课 - 旧约导论课程节选