雌二醇水平每增加一个标准差，这种疾病的危险性就增长25%。
For each standard deviation increase in estradiol level, the risk for the disease went up by 25 percent.
在赤道这一标准差是0.5%，这就是说在30天间隔纬向平均反射率增加1%，在95%水平时统计上是显著的。
This means that a zonal mean albedo increase of 1% for a 30-day interval is statistically significant at the 95% level.
后测的分数明显高于前测的分数，后测平均分比前测平均分高出8.667分，而且后测的标准差小于前测，说明学生的整体水平有了提高；
The mean of post-test has improve by 8.6667 comparing to the pre-test, and the standard deviation of the post-test decreases, which implies students' average level improves.
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