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.

youdao

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.

youdao