在学习了饲养青蛙或蟾蜍这一章后,老师带我们到生物园的小水池寻找蝌蚪,但是没有找到,却意外地发现靠近小水池的小树下有一堆泡沫样的粘液。开始大家以为是蛇吐出来的东西,有些害怕,后来在老师的鼓励下,几个胆大的同学用树枝拨开了这堆泡沫,发现了在这堆泡沫里有一颗颗白色的圆形小颗粒。 After studying the chapter on keeping frogs or toads, the teacher took us to the small pool in the zoo to look for tadpoles, but did not find it, but unexpectedly found a pile of foamy mucus under the small tree near the small pond. Start everyone thought it was something spit it out, and some fear, and later encouraged by the teacher, a few daring students with the branches of this pile of foam, and found in this pile of foam in a white round small Granules.