And Noradrenaline is also the hormone that kickstarts the fight or flight response.

去甲肾上腺素也是启动战斗或逃跑反应的激素。

By suddenly changing the temperature of your environment, cold water therapy kickstarts each of your physical systems.

通过突然改变周围环境的温度，冷水疗法启动了你全身系统。

Every day, you produce one to two liters of spit. It kickstarts digestion and helps you swallow.

人类每天都会产生一到两公升唾液。唾液能促进消化并帮助吞咽。