twins就可以
eg：当S意识到她将拥有一对双胞胎时,她十分激动.
S were thrilled when they discovered they were going to have twins.
“一对双胞胎”用英语怎么说?好像感觉不是‘a pair of twins’
twins就可以
eg：当S意识到她将拥有一对双胞胎时,她十分激动.
S were thrilled when they discovered they were going to have twins.