Take the pata negra pigs in Spain and Portugal that spend their lives grazing on acorns.

以西班牙和葡萄牙的黑脚猪为例，它们一生都在吃橡子。

The acacia tree needs the ants to protect its leaves and keep it healthy, and in turn, the patas monkey needs those ants and their larvae as food.

金合欢树需要蚂蚁来保护它的树叶，以维持健康状态，另一方面，帕塔斯猴子需要那些蚂蚁和它们的幼虫作为食物。