例句：

• When faced with danger, adrenaline floods the body and prepares you to act quickly.
  （面对危险时，肾上腺素充斥全身，帮助你迅速做出反应。）
• She felt a rush of adrenaline as she ran the marathon.
  （她跑马拉松时感到一阵肾上腺素的激增。）