Research psychologists at North Carolina State University in Raleigh recruited 103 volunteers, ages 60 to 82, to perform simple arithmetic and recall tests.

研究心理学家在北卡罗来纳州立大学罗利招募103志愿者，年龄60至82岁，对他们进行简单的算术和记忆力测试。

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You could have one request perform a simple arithmetic activity and another request perform a resource intensive operation, such as reading or writing to a database.

可能有一个请求执行一个简单的算术活动，另一个请求执行一个资源密集型操作，比如数据库读写。

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Record the output voltage and perform some simple arithmetic to find the temperature in degrees Celsius or Fahrenheit according to preference.

只需记录输出电压并执行一些简单的计算，就能找到以摄氏度或华氏度为单位的温度。

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The majority of the sample was able to perform as high as level four (out of five) of the literacy test, meaning they were able to read, comprehend and answer questions about a simple text, and level three in numeracy, i.e. they were able to perform basic arithmetic operations.

UNESCO: Country Profile: Angola