Well, it has been calculated that if we were to remove bats from the equation, we're going to have to then use insecticides to remove all those pest insects that feed on our agricultural crops.
据计算如果我们把蝙蝠移除 出生态系统， 我们那时就要用 杀虫剂来消灭所有害虫 害虫蛀食我们的农作物。