In my dreams I would have twins, a boy and a girl.
2017年12月四级真题（第一套）听力 Section C
英语六级真题
Social learning theories also don't explain why reinforcement and modeling work for some children but not others, especially those in the same family and even identical twins.
出自-2013年6月阅读原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
双胞胎之一;孪生儿之一
If two people are twins, they have the same mother and were born on the same day.
When a place or organization in one country is twinned with a place or organization in another country, a special relationship is formally established between them.