命中註定的事;難免的倒霉事;不可挽回的事
牛津電影裡 38%
used to say that you do not want to discuss or think about sth bad or unpleasant that has happened, but just accept it
Nothing serious. Just one of those things.
釋義來自《牛津高階英漢雙解詞典》第 9 版