pulse wind tunnel balance

例句：

1. 1. He felt his pulse quicken as he ran up the stairs.
   他跑上楼梯时感觉到脉搏加快了。
2. 2.The doctor checked her pulse to make sureshe was okay.
   医生检查了她的脉搏，以确保她没事。
3. 3. Her heart raced withfear as she watched her pulse drop.
   她看着自己的脉搏下降，心里充满了恐惧。