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星期六下午,天气十分闷热,我走到院子散心,忽然看见地上的草丛中有一只蜗牛在缓缓地爬行。“蜗牛是害虫还是益虫?为什么它走过的地方总留下长长的一条线?它的鼻子、眼睛在哪里?”一连串的问号浮上我的脑海。我来了兴趣,决定自己搞明白。我先采用曾经学过的“用各种食品测验乌龟
On Saturday afternoon, the weather was very sultry. I walked to the yard to relax and suddenly saw a snail in the grass on the ground crawling slowly. “Isn’t a snail a pest or a beneficial insect? Why does it leave a long line where it walks? Where is its nose and eyes?” A series of question marks floated on my mind. I came to my interest and decided to understand it myself. I first used the “Tested turtles with various foods”