"And what happens is we have mazes and the children are able to organize the robots and see if they can get them through the maze within a certain time period."

VOA: special.2010.07.28

But at the same time the Market Revolution is going to bring a certain sense of anxiety, even dread, even despair.

同时市场革命将,带来某种焦虑,甚至是可怕的和绝望的

耶鲁公开课 - 美国内战与重建课程节选

For my perspective, even if you understand God to be the creator of the world, I don't think that means that God is causing a certain natural event to happen at certain time.

从我的角度来说，即使你明白,上帝是世界的创造者，但这并不意味着上帝,导致了某个自然界的现象在特定的时间发生。

普林斯顿公开课 - 人性课程节选

Only the winner of each event can qualify, and even then they need to match a certain time.

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"We owe it to the survivors not simply to say that a certain time has passed and that it should be swept under the carpet, " he says.

BBC: Former Auschwitz Nazi guard Hans Lipschis found in Germany

What's more you can set it to start cooking at a certain time - and then send a message from your smartphone to delay it turning itself on if you get stuck at work.

BBC: Technology