For example, it is easy to tear away and add to a clay model, not so easy with one made of hard woods; but it is easier with the latter to establish a regular module or repeating shape or motif.

• 例如，粘土模型很容易去掉或添加，而用坚硬的木头所制作的模型就不行；但是后者更易于建立规则的模组和重复造型或主题。