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找一个装眼药水的小塑料瓶和一根铁钉,用胶布把它们缠在一起,在紧靠铁钉的塑料瓶侧壁上戳几个小孔,在瓶口接上橡胶管,这就做成了潜水艇模型。
Look for a small plastic bottle with an eye drop and a nail. Use a tape to wrap them together. Punch several holes in the side wall of the plastic bottle next to the nail and attach a rubber tube to the bottle mouth. Made a submarine model.