A mock-up, then, is something you pungle together out of duct tape, chewing gum, paper clips, cardboard, and paint just to test a concept that you don't necessarily want to implement.
模型是用管道粘胶、口香糖、纸夹和油漆等制成的试验品，用于测试那些目前还不想实现的概念。
2
Cut out two pieces of cardboard and gum them together.
割两块硬纸板，再把它们粘在一起。
3
Perhaps because of a natural gum in the plant, the layers stuck together.