A debutante is a young woman from a rich, high-class family who is shown to that high-class world for the first time. The old custom is a special dance, a debutante ball, where she 'comes out' — not out of a door, but into society, so important people can meet her.

A debutante一位debutante，is a young woman from a rich, high-class family是來自富裕上流家庭的年輕女子，who is shown to that high-class world for the first time第一次被引介進入那個上流社交圈。The old custom是舊時的習俗 is a special dance就是舉辦一場特別的舞會，a debutante ball也就是debutante舞會，where she 'comes out'在那場舞會上她會「登場」——not out of a door不是走出門的意思，but into society而是進入社交界，so important people can meet her讓重要人士能認識她。

You will find this more in old novels, history, and society news than in ordinary talk. Some families in Britain and the American South still hold these balls; many other people now find the custom old-fashioned, even a little silly.

You will find this你會 more in old novels, history, and society news比較常在舊小說、歷史、和社交新聞裡看到這個字，than in ordinary talk而不是在日常對話裡。Some families in Britain and the American South英國和美國南方有些家族 still hold these balls仍然會舉辦這種舞會；many other people now find the custom old-fashioned, even a little silly但現在許多人覺得這個習俗old-fashioned（過時），甚至有點可笑。

Though actually, writers still use the word, and they sometimes stretch it to mean any young, polished, well-connected woman, even when there was no ball at all. It feels formal and a bit from another time.

Though actually不過其實，writers still use the word作家仍然會用這個字，and they sometimes stretch it to mean any young, polished, well-connected woman有時候會把它延伸來指任何年輕、有教養、人脈好的女性，even when there was no ball at all即使根本沒有辦過舞會。It feels formal and a bit from another time這個字感覺很正式，也有點像是另一個時代的用詞。