中国古代马球运动兴衰演变的过程，典型地体现出时尚流行的“常态曲线”规律，构成了一个完整的流行周期；
The ups and downs of polo in ancient China is a typical display of the regular pattern of "normal curve" popularizing nowadays, and has formed a whole period of popularity.
曾听人说过：人生的价值是一条常态分布曲线，如果40岁是顶点的话，四十以前，金钱的价值高一些，四十以后，时间的价值越来越高了。
Had heard people speak: the value of life is a normal distribution curve, if the 40-year-old is a vertex, then 40 before the value of money higher, 40 after the value of time more and more high.
随着降雨雨型的变化，土壤入渗速率依时间变化曲线与常态有压入渗时迥然不同。
The curve of soil infiltration rate with time is different greatly from that of normal infiltration in press.
随着降雨雨型的变化，土壤入渗速率依时间变化曲线与常态有压入渗时迥然不同。
The curve of soil infiltration rate with time is different greatly from that of normal infiltration in press.
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