The wealth of a country is measured by GDP per capita and it stands for the average value of goods and services a person produced living his country.
某个国家的财富按照人均GDP来进行衡量，这个标准反映了某个国家居民的平均生活水平。
The arithmetic average value of the records shall as the measured value.
以每小时读数的算术平均值作为测定值。
Measurement of sample: single sample automatic measuring, measuring the number of times 2, 3, 5, 10, 50 set, measured at the end gives the average value and standard deviation.
样品测量：单样品自动测量，测量次数2、3、5、10、50次任意设定，测量结束给出平均值和标准偏差。
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