1. The doctor examined the newborn baby's umbilici to make sure they were healing properly.
医生检查了新生儿的肚脐，确保它们正在适当地愈合。
2. The umbilici of the flowers were carefully studied by the botanist to understand their reproductive structures.
植物学家仔细地研究了这些花的花托，以了解它们的生殖结构。