oh [əʊ]

以下由轻松背单词网站提供

int.啊，噢，呀（表示惊讶，恐怖，赞叹等）

used to express different emotions , such as surprise , disappointment and pleasure , often as a reaction to something someone has said

Oh, what a heavy rain! 多大的雨呀！
Oh dear! I forgot to post the letter. 哎呀！我忘了寄信。