常见例句双语例句According to the United State Geological Survey, bats save farmers at least $3 billion a year by scarfing down insects that would otherwise eat crops.据美国国家地质调查局，蝙蝠吃掉了很多昆虫，每年至少要为农民节省30亿美元，否则昆虫就会去吃农作物。 返回 bats survey