现在，在湖泊生态系统的草原上，我们可以预料能找到各种动物的化石，至少在这些特定地点已经发现了大量的化石。

Now, in a grassland of Lake Ecosystem, we'd expect to find fossils from a variety of animals, and numerous fossils have been found at least at these particular sites.

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因此，天文学家更喜欢水蒸气很少的干燥地点，而水蒸气通常出现在海拔较高处。

Astronomers therefore prefer dry sites with little water vapor, which is generally found at higher altitudes.

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好吧，那么假设现在是那个时间和地点。

All right, so suppose this is the time and place.

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We normally think of teaching as a synchronic process, you and I are in the same place and in the same time while we are learning, when in fact at least right now we are not.

我们通常设想教学是限于一时的过程，你我在同一地点,同一时间学习，但事实上至少现在就不是这样。

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And that's right where we are setting the tent up right now.

地点就在我们现在搭建帐篷的地方。

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You obviously know where and you know when, because you're here.

很显然你们知道时间地点，因为你们现在就在这儿。

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