ornithology
🇺🇸
/ˌɔːrnɪˈθɑːlədʒi/
🇬🇧
/ˌɔːnɪˈθɒlədʒi/
the study of birds
He decided to study ornithology because he's always loved birds.
他决定研究鸟类学,因为他一直很喜欢鸟。