instinct

Mother birds have a powerful instinct to protect their young from predators.

(Chinese) 鸟妈妈有一种保护幼鸟免受捕食者侵害的强烈本能。

My first instinct when the fire started was to grab my cat and run outside.

(Chinese) 起火时我的第一直觉是抱起我的猫往外跑。