retrocardiac

例句：

1. 1. The heart's structureis a complex network of veins andarteries that work together to pump bloodthroughout the body.
   心脏的结构是一个复杂的静脉和动脉网络，它们共同工作以将血液泵送到全身。
2. 2. The studyof the heart'sstructure has led to new insightsinto how it works and how itcan be improved.
   对心脏结构的研究表明了它如何工作以及如何得到改善的新见解。
3. 3.In some cases, doctors may recommend surgeryto correct a heart condition that involves theretrocardiac chambers.
   在某些情况下，医生可能会建议进行手术来纠正涉及回心室腔的疾病状况。