He was forced to halt his blog and Webcast at the most critical time.

VOA: standard.2009.07.27

I don't have any very good answers for that and yet it is one part of the traditional explanation is this, and it's a very important one and much debated, that at a critical time in the battle one technique would be one side would give one great big shove.

我并没有令人满意的答案,目前还有一种传统解释,很重要,同时也饱受争议,那就是在战局千钧一发的时刻,有一项技术就是一方给对方致命一推

耶鲁公开课 - 古希腊历史简介课程节选

But it began a Critical Study of the poems for the first time and Critical Methods were applied to history for the first time ever, really, in the early nineteenth century and thereafter.

这开启了诗歌批判研究的先河,十九世纪初期,人们首次将批判理论应用于,历史文献的研究中

耶鲁公开课 - 古希腊历史简介课程节选

His trip comes at a critical time with the results of the country's presidential election still uncertain and worries a disputed outcome, due to allegations of widespread ballot box stuffing, could spark further civil violence.

VOA: standard.2009.09.04

"Well,this is critical," "The risk of defeat goes up during this time because you have got, in essence,a political campaign.

VOA: standard.2009.07.31

At the same time, General Allyn says the military units must continue to transport food, water and other critical items that are needed immediately.

VOA: standard.2010.01.19