《生物精神病学期刊》的主编John Krystal博士称：“失眠是与大脑灰皮质层减少相关精神病的一种普遍症状。 通常来说，这是精神行为错乱或者高生活压力的一种症状，Altena博士和她的同事们的研究表明，如果失眠症得不到治疗会到来更多的危险，例如对大脑微观结构上的损害。”
The study by Dr Altena and her colleagues suggests there are additional risks of not treating insomnia, such as detrimental effects on the microstructure of the brain.
如果你想成为一名搞研究的物理学家或教授，你一定要拿到博士学位，通常要4至5年(有时更多)的学期并作出原创性研究。
If you want to become a research physicist or professor, you must get a Ph.D., which usually involves 4 to 5 years (sometimes more), and involves publishing original research.
而美国一流大学的学生学费是他们的七倍之多，大学期间他们通常自已挣学费。
Students at leading American universities pay seven times as much; they tend to work their way through college to pay for their tuition.
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