Snakes are unique animals with special ways to sense their surroundings.
蛇是一种特殊的动物，它们有独特的方式感知周围环境。
Unlike humans, snakes do not use their noses to smell.
和人类不同，蛇不会用鼻子来闻气味。
Instead, they use their tongues to detect smells in the air.
它们用舌头来探测空气中的气味。
A snake flicks its tongue in and out very quickly.
蛇会快速地伸出和收回舌头。
The tongue picks up tiny scent particles from the air or ground.
舌头可以收集空气或地面上的微小气味分子。
Then, the snake moves its tongue to a special organ in its mouth.
然后，蛇会把舌头伸进嘴里的一个特殊器官。
This organ is called the Jacobson’s organ.
这个器官叫做雅各布森器官。
It helps the snake "smell" and understand its surroundings.
它帮助蛇“闻”到气味，并判断周围的环境。
Using its tongue, a snake can find food or sense danger.
通过舌头，蛇可以找到食物或感知危险。
Snakes do not have external ears like humans.
蛇没有像人类那样的外耳。
But they can still sense vibrations in the ground.
但它们能感受到地面的震动。
If an animal or person walks nearby, the snake can detect it.
如果有动物或人走近，蛇可以通过震动察觉到。
This helps them avoid danger or hunt for prey.
这可以帮助它们避开危险或寻找猎物。
Snakes also have very good eyesight, especially some that hunt at night.
一些蛇的视力很好，特别是夜间捕猎的蛇。
Some snakes, like pit vipers, can sense heat from other animals.
一些蛇，比如蝮蛇，能感应到其他动物的体温。
This helps them hunt even in the dark.
这让它们即使在黑暗中也能捕猎。
Snakes rely on their tongue, vibration sensing, and heat detection to survive.
蛇依靠舌头、震动感应和热感知来生存。
Now you know that snakes use their tongues to detect smells and feel vibrations to sense movement!
现在你知道蛇用舌头探测气味，并能通过震动感知周围的动静了！
