pulse without vitality

例句：

1. 1. He felt a sudden surge of energy as his heart began to pulse.
   他的心脏开始跳动时，他感到一阵突如其来的活力。
2. 2. The doctor checked her pulse and blood pressure before administering the medication.
   医生在给她服药之前先检查了她的脉搏和血压。
3. 3. She was worried that her pulse might be slowing down due to her age.
   她担心自己的脉搏会因为年龄而变慢。