If a group of people pair off, they divide into pairs in order to do something, and if you pair them off, you divide them into pairs.
如果一群人pair off，那麽就是說他們是分成兩(liǎng)人爲一組來(lái)做某事的，如果你把他們pair off，那麽就是說你把他們分成兩(liǎng)兩(liǎng)一組。
兩人一組結成對(duì);把(一組人)分成幾(jǐ)對(duì)
The students paired off to practise their conversational skills.
學生們兩人一組進行會(huì)話(huà)技巧練習 。
After dinner the boys and girls paired off and went to the dance.
會餐後(hòu) ， 男女青年們成對(duì)成對(duì)地去跳舞 。
