ductus例句

Most babies have a closed ductus arteriosus by 72 hours after birth.
大多数婴儿在出生后72小时内动脉导管闭合.

Figure B shows a heart with a patent ductus arteriosus.
图B显示了存在“开放性动脉导管”问题的心脏.

What are the symptoms of a patent ductus arteriosus?
动脉导管未闭有哪些症状?

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