fetus in fetus

• 胎内胎； 隐联体双胎

fetus in fetus的用法和样例：

例句

1. Previously reported cases are briefly reviewed and the differences between teratoma and fetus in fetu are discussed.
   于此简略回顾过去的文献，并论述畸胎瘤与胎内胎之区别要点。