Older medical English used retarded of a person whose mind had developed more slowly than other people of the same age. You will still find it in old textbooks and old files.

Older medical English早期的醫學英語 used retarded用retarded這個字 of a person whose mind had developed more slowly than other people of the same age來形容心智發展比同齡人慢的人 You will still find it in old textbooks and old files你還是會在舊教科書和舊檔案裡看到這個字

Many people now find this word offensive, and you should not use it about anyone. Doctors today say things like intellectual disability, or they talk about delayed development, in kinder words.

Many people now find this word offensive現在很多人覺得這個字很冒犯 and you should not use it about anyone你不應該用它來稱呼任何人 Doctors today say things like intellectual disability, or they talk about delayed development, in kinder words現在的醫生會用比較溫和的說法，像是智能障礙或發展遲緩

Though actually, the same spelling is also just the ordinary past of retard, “to slow down” — retarded growth meaning growth that was slowed — and that technical use is not an insult; it just sounds unfortunate now, because the human meaning has become a cruel name.

Though actually不過事實上 the same spelling is also just the ordinary past of retard, "to slow down"同樣的拼法其實也只是retard（使變慢）這個字的過去式 retarded growth meaning growth that was slowed意思是被拖慢的成長 and that technical use is not an insult這種技術性的用法並不是侮辱 it just sounds unfortunate now只是現在聽起來不太好 because the human meaning has become a cruel name因為指人的那個意思已經變成一個殘忍的稱呼

Some people also throw retarded around as a joke meaning “stupid.” That use hurts, and it is the main reason the word is avoided. If you meet it in an old text, read it as the old medical label, not as a word you should copy.

Some people also throw retarded around as a joke meaning "stupid."有些人也會開玩笑地用retarded來說「笨」 That use hurts這種用法很傷人 and it is the main reason the word is avoided也是這個字被避免使用的主要原因 If you meet it in an old text如果你在舊文章裡遇到這個字 read it as the old medical label就把它當作舊時代的醫學說法來理解 not as a word you should copy而不是你該學著用的字