Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds , if it were not for the protection we get from insect - eating animals.
昆虫会使我们无法在这个世界上生存: 如果不是由于食虫动物的 保
《用法词典》
Why have we reason to be grateful to insect - eating animals?