• 所谓塑料其实合成树脂中的形状天然树脂中的相似因又经过化学力量合成称之为塑料。

    The so-called plastic, it is in fact a kind of synthetic resin, the shape with the natural resin of pine resin in the similar, but has the power to synthesize chemically, and is called plastic.

    youdao

  • 所谓塑料其实合成树脂中的形状天然树脂中的相似因又经过化学力量合成称之为塑料。

    The so-called plastic, it is in fact a kind of synthetic resin, the shape with the natural resin of pine resin in the similar, but has the power to synthesize chemically, and is called plastic.

    youdao

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