．”尽管如此，奥马仍然写出了颇有价值地《算术问题》(Problems of arithmetic)和一本关于音乐地小册子．
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problems of arithmetic
算术问题
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Psychologists had 543 men and women in a mall, ages 25 to 75, take a test that involved quickly evaluating whether a series of arithmetic problems had been properly solved.
WSJ: Swearing Off Pain, Age and Competition, a 16-Foot Emoticon | Week in Ideas
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