umbilical stalk

例句：

1. 1. The baby's umbilical stalk was removed to prevent infection.
   为了预防感染，婴儿的脐带被切除了。
2. 2. The umbilical stalkis a fragile part of the human bodythat needs special care.
   脐带是人体脆弱的部分，需要特别的照顾。
3. 3. During labor, the doctor carefully monitors theumbilical stalk to ensure it ishealthy.
   在分娩过程中，医生仔细监测脐带以确保其健康。