This property is characteristic of waxes, putty, damp clay, plasters, and some metals, but not of many materials that are generally known as plastics.

这种性质是蜡、油灰、湿泥土、灰泥和一些金属的特性，但不是一般称为塑料的许多材料的特性。

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If you have ever played with Silly Putty, you can use clay.

如果你曾用过油灰，你就可以使用研磨泥。

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