translation.en: The first is competitive, because they're looking for mates, and the second is cooperative, because if they're all vocalizing in sync together, it makes it really difficult for predators like coyotes, foxes and owls to single out any individual for a meal.
translation.zh: 第一个是竞争，因为它们在求偶 第二个是合作， 如果它们一齐同步发声的话 土狼、狐狸和猫头鹰等捕食者 就很难捕食到某单只青蛙。