pulse high frequency apparatus

例句：

1. 1. He felt a sudden surge of energy when he took his first breath.
   当他第一次吸气时，他感到一股突然的活力。
2. 2. The doctor checked her pulse to make sure she was still alive.
   医生检查了她的脉搏，以确保她还活着。
3. 3. Her heart began to race as she faced the daunting task ahead.
   面对这个艰巨的任务，她的心脏开始加速跳动。