Snakes spread their tongue tips apart near the ground and whip them up and down in the air, sending odor molecules back into their vomeronasal organs.

蛇在靠近地面的时候张开舌尖，在空中上下摆动，将气味分子送回鼻器官。

Like many other mammals, vents in the roof of an elephant's mouth lead directly to the vomeronasal organ.

与许多其他哺乳动物一样，大象嘴巴顶部的气孔直接通向犁鼻器。

They could just rely on their nose, but the vomeronasal organ has its own set of chemical receptors, so it can smell different smells.

他们可以只靠鼻子， 但犁鼻器有自己的一套化学受体，所以它可以闻到不同的气味。