匹兹堡大学精神病学比阿特丽斯·卢纳教授用神经影像研究青少年的大脑，用一个简单的测试阐述这个学术问题。
Beatriz Luna, a University of Pittsburgh professor of psychiatry who USES neuroimaging to study the teen brain, used a simple test that illustrates this learning curve.
弗朗西斯教授等学术界人士称，他们一年需要约300人捐献大脑来帮助他们寻找治疗阿尔茨海默氏病的方法，但从未有那么多人自告奋勇前来捐献。
Academics like professor Francis say they need some 300 people a year to donate their brains to help find cures and treatments for Alzheimer's, but nothing like that number are coming forward.
答：人们认识糖尿病始于两千多年前，当时，希腊医师阿雷提乌斯注意到身体的多尿和消瘦。
A: Diabetes was recognized more than two millennia ago, when prodigious production of urine and wasting of the body were first noted by Greek physician Aretaeus.
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