Scientists once thought that these forests existed only in moderate and cold climates.

VOA: special.2009.08.25

And then, you start thinking, "Well, I could really start doing this if only X and if I had this person or if this technology existed or if this happened or this happened."

之后，你会开始思考，恩，只要某项条件成熟了，只要我认识这个人,或是如果这个技术存在,或是如果这个或那个发生了，我就能开始落实这个点子了“

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

But we can only remember, he thinks, in the relevant way if our soul existed before the birth of our body, before the creation of our body.

但是我们之前知道,他认为我们的灵魂,存在于我们的身体诞生之前,在我们的身体被创造之前

耶鲁公开课 - 死亡课程节选

"We have a moral imperative to do this. We are the greatest country that ever existed in the history of the world, the great economic leader of the developed world, but the only one that does have access to quality, affordable health care for our people, and we intend to do so,".

VOA: standard.2009.09.04

And Athens was until only fairly recent times in human history the most famous democracy that ever existed. I say fairly recent times until you know the American democracy.

而雅典是直到近期为止,一直是人类历史上曾存在过,最著名的民主之城，我所谓的近期,当然是指在美国民主出现之前。

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