2009 was a tough year, and 2010 will not be easy. But at least we still have dreams.
2009年不容易啊，2010年估计也不会太好过，但至少我们还有梦！
Sleep and dreams have interested people for centuries. Scientists are learning more about sleep, but they still know very little about why we dream.
几个世纪以来，睡觉和做梦都让人着迷。科学家对于睡觉了解了很多，但是他们仍然不清楚为什么人会做梦。
Even though scientists have been studying dreams for hundreds of years, we still don't understand why we have them or what they mean.
尽管科学家已经对梦进行了几百年的研究，却依然无法解释做梦的原因或梦境的意义。
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