No reference to their existence appears in any literature of the period.

该时期的任何文献中都没有提及他们的存在。

《柯林斯英汉双解大词典》

They are a priceless record of a brief period in Colorado history.

它们是科罗拉多历史上一段短暂时期的宝贵记录。

《柯林斯英汉双解大词典》

Which period of history would you most like to have lived in?

你最喜欢生活在哪一个历史时期？

《牛津词典》

Last week,W.W.E.officials reported the company earned more than one hundred seventeen million dollars in the fourth financial period of last year.

VOA: special.2010.02.19

It began to infiltrate other disciplines and was in general a high-spirited horse for that certain period of time.

它逐渐渗入到其它学科,总之是那个时代的一匹黑马。

耶鲁公开课 - 文学理论导论课程节选

So the work was probably concluded shortly after that date: so in exile or towards the end of the exilic period.

因此这部作品很可能就是在那个日期不久后结束的：,也就是在流放期间或流放即将结束时。

耶鲁公开课 - 旧约导论课程节选

These plans -- the tax also -- there's a phase-in period of five years for this tax, as well.

WHITEHOUSE: Press Briefing

Also, unlike previous versions, this bill offers a phase-in period of two years.

FORBES: U.S. To Hit Traders, Money Managers With A Tax Shot To The Gut

It proposes to cut empty property non-domestic rates relief from a maximum of 50% to a maximum of 10% for commercial properties, after a phasing in period of three months.

BBC: Empty property rates relief debate