名词
中文翻译：Unknown
同义词：
['umbral', 'eclipse例句：1. The umbilical cord is the connection between a fetus and its mother.（脐带是胎儿与其母亲之间的连接。）']
例句：
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1. The umbilical cord is the connection between a fetus and its mother.
脐带是胎儿与其母亲之间的连接。
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2. During an eclipse, the moon passes in front of the sun, causing the Earth's shadow to appear on the surface.
月食期间，月亮位于太阳前方，导致地球的影子出现在地表。
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3. The umbilical cord is essential for the growth and development of the fetus.
脐带对于胎儿的成长和发育至关重要。