ornithology
🇺🇸
/ˌɔːrnɪˈθɑːlədʒi/
🇬🇧
/ˌɔːnɪˈθɒlədʒi/
the study of birds
He decided to study ornithology because he's always loved birds.
他決定研究鳥類學,因為他一直很喜歡鳥。