HSI

例句：

1. 1.The doctor told me to rest my heart after the surgery.
   医生说我在手术后要休息我的心脏。
2. 2.Heart disease is a major cause of death worldwide.
   心脏病是全球死亡的主要原因之一。
3. 3. I'm having a heart attack, please call an ambulance immediately!
   我正在心脏病发作，请立即呼叫救护车！