As the worm turns: Besides having "economic" uses like catching fish or feeding ducks, the earthworm has even more significance for mankind in that the history of its life is one of ecological balance.
蚯蚓除了用來釣魚、餵鴨等「經濟」作用；它對人類更重要的意義，在於它的生活史就是一部生態平衡史。