At the same time he heard, or imagined he heard,a light, soft step and then another.

VOA: special.2009.10.31

About one-third of Southern white families at one time or another had at least a toehold in slave ownership.

大约三分之一的南方白人家庭,在某一段时期至少都拥有过奴隶

耶鲁公开课 - 美国内战与重建课程节选

And anyway, what person with any sensitivity to greatness ? has not felt this way at one time or another?

而任何真有崇高概念的人，谁没时刻感受到,那种假情假意？

耶鲁公开课 - 政治哲学导论课程节选

Almost every part of the country has received snowfall at one time or another.

VOA: special.2010.01.05

Or sometimes they might have men one day, women another time, and mixed at other times.

有时一天男子用，一天女子用，其余时间同用。

耶鲁公开课 - 新约课程节选

Hyun adds,the North Korean leader also has to think about possible power succession, whether it happens right away or some time later- that is another reason to reinforce his power base.

VOA: standard.2009.06.22

I think part of the message here is that... I want to mention just one more, I'm afraid we're out of time But believe it or not, I could talk to you for another 24 hours.

我觉得需要传达的信息是。。。,我想要再次重复一遍，我担心时间不够了,信不信由你，我可以跟你再聊,24个小时。

普林斯顿公开课 - 人性课程节选

The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.

VOA: standard.2010.07.21

At another time, Zeus destroys the wide camped army of people or wrecks their city with its walls, or their ships on the open water.

其他的时候,宙斯会屠戮露宿的人,摧毁他们的城墙,或在开阔的水域粉碎他们的船只

耶鲁公开课 - 古希腊历史简介课程节选

It's P-functioning,as we've put it at one time or another.

我们称之为人格功能。

耶鲁公开课 - 死亡课程节选