N-UNCOUNT
肾上腺素（情绪激动时肾上腺分泌的一种化学物质，能加快心跳及产生更多能量）
Adrenalin is a substance which your body produces when you are angry, scared, or excited. It makes your heart beat faster and gives you more energy.
例句
Seeing the crowd really got my adrenalin pumping.
看见这么多人确实让我热血沸腾。