上周,我们介绍了著名心脏病医生Michael DeBakey的生平。他于上个月逝世,享年99岁。今天,我们来谈谈有关他工作的话题。心脏是个很复杂的器官。
We talked last week about the life of famed heart doctor Michael DeBakey. He died this month at age ninety-nine.Today, we talk about the object of his work. The heart is a complex organ that starts beating a few weeks after conception. At this point the heart is a tube. In the coming days, it grows …
上周,我们介绍了著名心脏病医生Michael DeBakey的生平。他于上个月逝世,享年99岁。 今天,我们来谈谈有关他工作的话题。心脏是个很复杂的器官,它在怀孕后几周就开始跳动。这时心脏还只是一个管状器官。在接下来的日子里,它慢慢发育,并弯曲成心脏的形状。 随后,它分成四部分。随着心脏的跳动,它将血泵入这四个心…