你需要:一升自来水,水质净化液,螺旋藻片(或鱼食),二到三只田螺,一个玻璃罐或鱼缸,一片用来盖住鱼缸口的铝箔,碎石或沙子,笔记本和笔。第一步:往缸内注入自来水,至缸顶部五厘米处,然后倒入碎石。第二步:在水中加入四滴水质净化液,然后静置24小时。第三步:小心地将田螺放在碎石上,用铝箔将缸口盖住,在上面戳几个洞用来换气。第四步:观察田螺一天,它们活跃吗?它们移动位置了吗?把观察结果记下来。 You need: one liter of running water, water purification solution, spirulina tablets (or fish), two or three snails, a glass jar or aquarium, an aluminum foil, gravel or sand to cover the mouth of the aquarium, a notebook and a pen . The first step: into the cylinder into the tap water, to the top of the cylinder five centimeters, and then into the gravel. The second step: add four drops of water quality in the water purification solution, and then allowed to stand for 24 hours. Step Three: Carefully place the snail on the gravel, cover it with aluminum foil, and poke a few holes in it to ventilate. Step Four: Watch the snail one day, are they active? Are they moving? Write down the observations.