He was unable to recall the exact amount of time he had spent on his research, but it was extensive.
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Hiː wəz ʌnˈeɪ.bəl tu ˈriː.kɑːl ðə ɪɡˈzækt əˈmaʊnt əv taɪm hiː hæd spɛnt ɒn ˈhɪz rɪˈsɜːrtʃ bʌt ɪt wəz ɪkˈstɛnsɪv. Hí uâz ânêibâl tu ríkál dâ iɡzékt âmáunt âv táim hí héd spént ón hiz risârrtch bât it uâz iksténsiv.
Ele não conseguiu se lembrar da quantidade exata de tempo que dedicou à sua pesquisa, mas foi significativo.
Hiː wəz ʌnˈeɪ.bəl tu ˈriː.kɑːl ðə ɪɡˈzækt əˈmaʊnt əv taɪm hiː hæd spɛnt ɒn ˈhɪz rɪˈsɜːrtʃ bʌt ɪt wəz ɪkˈstɛnsɪv. Hí uâz ânêibâl tu ríkál dâ iɡzékt âmáunt âv táim hí héd spént ón hiz risârrtch bât it uâz iksténsiv.