straight pulse

例句：

1. 1.He felt a sudden sharp pain in his right side.
   他突然感到右侧一阵剧烈的疼痛。
2. 2.The doctor checked her heart rate and found it to be normal.
   医生检查了她的心率，发现它是正常的。
3. 3. She took deep breaths to steady her nerves.
   她深呼吸以稳定神经。