SA node
英汉例句
- Activation of the heart normally begins in the sinoatrial node.
在正常情况下，心脏的活动始于窦房结。 - This process continues over and over as the atria refill with blood and other electrical signals come from the SA node.
随着心房的再次充血和窦房结电信号的再次产生，这个过程会一直重复下去。