“头尾尖尖钻土中,纵横交错打地洞,为保农家好收成,不怕苦来不怕脏。”亲爱的同学,读过这则谜语,您一定能够不假思索、迅速准确地猜出我是谁吧?不错,我就是人们随处可见、极其平凡的“义务耕耘者”——蚯蚓。近些年来,由于生物学家研究发现蚯蚓可做高级蛋白饲料,所以我辈越来越受到人类的 “Diamonds in the head and tail are drilled in a criss-cross pattern to ensure a good harvest for the farmer. They are not afraid of getting dirty.” Dear students, after reading this riddle, you will be able to guess me quickly and accurately. Who is it? Well, I’m the “common-living” cultivator who is everywhere and everywhere. In recent years, as biologists have discovered that earthworms can be used as high-grade protein feeds, my generation has become increasingly human.