来自岩心上部的发现证实了科学家们已经知道的情况：最后一个冰河时代的气候变化非常快。

Findings from the upper sections of the cores have confirmed what scientists already knew—climate during the last ice age fluctuated rapidly.

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这给人的感觉是，我们已经走了很长的一段路，而且走得非常快。

It felt as if we had come a very long way, very quickly.

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最后，我找到了刹车，但是已经太晚停不下来了：开得非常快，山也非常陡峭。

At last I found the brake but it was too late to stop: I was travelling fast and the hill was too steep.

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