每日口說挑戰 【TED-Ed】媽媽，我們是從哪裡蹦出來的？來看看哺乳類的三種生產法 (The three different ways mammals give birth - Kate Slabosky)

今日挑戰句子

The placenta is what keeps the calf alive during pregnancy. Directly connected to the mother's blood supply, it funnels nutrients and oxygen straight into the calf's body via the umbilical cord, and also exports its waste.

胎盤能維持幼子得以在懷孕的雌體內生存，與母親的血液供應直接相連，透過臍帶，運送養分與氧氣直接到幼子的身體，並且同時排出體內代謝廢物。