NATURAL NUMBER
\nˈat͡ʃəɹə͡l nˈʌmbə], \nˈatʃəɹəl nˈʌmbə], \n_ˈa_tʃ_ə_ɹ_əl n_ˈʌ_m_b_ə]\
Definitions of NATURAL NUMBER
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By Princeton University
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