因为两种性别的白尾鹿都是通过嗅和舔来对雄鹿的摩擦做出反应的，所以摩擦可能还有一个非常重要的附加功能。

Because both sexes of white-tailed respond to buck rubs by smelling and licking them, rubs may serve a very important additional function.

youdao

youdao

他舔了一下自己的手指。

He licked his fingers.

《牛津词典》