pulse analog circuit

例句：

1. 1. He was having a hard time keepinghis pulse under control.
   他很难控制自己的脉搏。
2. 2. The doctor checked her pulse to makesure she wasn't having a heartattack.
   医生检查了她的脉搏，以确保她没有心脏病发作。
3. 3. Shetook a deep breath andcounted her own pulse before speaking.
   她在深呼吸后数了数自己的脉搏，然后才说话。