pulse oscilloscope

例句：

1. 1.He was having a hard time keeping his pulse under control.
   他很难控制自己的脉搏。
2. 2.The doctor checked her pulse to make sure she wasn't having a heart attack.
   医生检查了她的脉搏，以确保她没有心脏病发作。
3. 3. She felt her pulse quicken as she stood up.
   她站起来时感觉到脉搏加快了。