单词 | umbilical cord |
释义 | umbilical cordnoun1 a : a cord arising from the navel that connects the fetus with the placenta and through which respiratory gases, nutrients, and wastes pass b : yolk stalk 2 : a tethering or supply line (as for an astronaut outside a spacecraft or a diver underwater) 3 : a necessary, supportive, or nurturing link or connection |
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