成双

[chéng shuāng]

• atwain
• gemination
• geminate
• couple(of forces)
• pairing
• doubling

例句

1. 饭后我们成双成对地跳舞去了。
   After dinner we paired off and went to dance.
2. 成双成对多，珠联璧合少。
   It is not every couple that is a pair.
3. 到学期末学生都已成双结对的了。
   The students had all paired off by the end of term.