一旦你完成了课本展示的内容，你就会扔掉这些烟斗通条、吸管和硬纸管。
Once you are done demonstrating whatever concept was in the textbook, you throw away the pipe cleaners, the straws, the cardboard tubes.
老太太会买四轮滑冰鞋，不抽烟的人会买烟斗通条。
Old ladies will buy roller-skates and non-smokers will buy pipe-cleaners.
老太太会买四轮滑冰鞋，不抽烟的人会买烟斗通条。
Old ladies will buy roller-skates and non-smokers will buy pipe-cleaners.
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