By inserting electrodes into one or more of the Chambers of the heart, via a large vein, it is possible to mimic its function by applying small electrical shocks at regular intervals.
把电极通入一个或多个心房或心室，并使导入一条大静脉，就可以通过有规律的小幅电击模拟窦房结发挥作用。
2
Nurses pricked her wrists, her ankles, her neck. Every day they had to find a new vein in her small body to inject the medicine.
每天护士刺她的手腕、足踝、颈部，尝试在她细小的身体上找寻一条新的血管来注射药物；
3
The vascular plexus of the pigeon small intestinal villi consisted of afferent mini artery, capillary network and efferent mini vein.