随着人们对这种病症熟悉程度的增加，平均的诊出年龄由1992年出生组的5.9岁下降到2000年出生组的3.8岁。
As the disorder became increasingly well-known, the average age of autism diagnosis fell from 5.9 among those children born in 1992 to 3.8 for those born in 2000.
研究人员们将一组小鼠在“夏季”模拟光照周期下（光照16小时，无光照8小时）从出生培养至断乳期，而将另一组小鼠在“冬季”模拟光照周期下（光照8小时，无光照16小时）培养至相同时间。
Researchers raised baby mice from birth to weaning in either "summer" light cycles of 16 hours of light and eight hours of dark or "winter" cycles of eight hours of light and 16 hours of dark.
该研究在1971年对出生于1901年和1902年的人群进行测试,在2000年对另一组出生于1930年的人测试并比较这两组.
The study compared a group of people born in 1901 and 1902 and tested in 1971 with another group born in 1930 and tested in 2000.
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