Pit Vipers,such as rattlesnakes,are a class of venomous snakes so named due to a pit between the eye and nose which detects heat from warm-blooede prey.

• 蝮蛇，例如响尾蛇，是毒蛇的一种，它们之所以叫这个名字是因为在它们的眼睛和鼻子之间有个洞，能够探测温血猎物的热能。