utero placental vein

例句：

1. 1. The utero placental vein is a critical component of the placenta.
   子宫胎盘静脉是胎盘的重要组成部分。
2. 2. During labor, the utero placental vein plays a crucial role in delivering oxygen to the fetus.
   在分娩过程中，子宫胎盘静脉在向胎儿输送氧气方面起着关键作用。
3. 3. The utero placental vein is responsible for the transfer of nutrients from the mother to the fetus.
   子宫胎盘静脉负责将营养物质从母亲传递给胎儿。