| 单词 | umbilical | 
| 释义 | umbilical1 of 2adjective  um·bil·i·cal  ˌəm-ˈbi-li-kəl  British alsoˌəm-bə-ˈlī-kəl 1   : of, relating to, or used at the navel   2   : of or relating to the central region of the abdomen   3   : being a necessary or nurturing link or connection  the town's umbilical rail line umbilical2 of 2 noun  : umbilical cord sense 2   | 
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