Catadidymus
[医] 下身联胎, 双上身联胎
🗣️ 情景例句
We tested it last week on twelve- to fifteen-year-olds,
我们上一周曾在十二岁至十五岁的孩子中试过这项游戏，
Do you have a book?
你有一本书吗？
We're in Class Three, Grade One.
我们是在一年级，三班。