This shows that the type of chemicals, or materials, is used in making the plastic.

这表明这种化学物质或材料是用来制造塑料的。

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Melamine, a chemical used in the making of plastic, was found in the baby formula; it later emerged that unscrupulous manufacturers had been adding it to food products to cheaply boost protein values.

这类奶粉中发现含有三聚氰胺，它是一种制造塑料的化学物质，后来被无良厂家添加到食品里以降低向其中添加蛋白质的成本。

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Making the trumpets is simple: plastic is melted into a mold and then it sets.A small group of women take off the sharp edges to finish off the process.

制造这种喇叭非常简单：塑料被融化制成模型然后安装，一群妇女磨平锋利的边缘，工序完成。

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"There is an exciting race going on between these people making these optic switches out of plastic and the people making the optic switches out of crystal, " said Gordon Thomas, a physicist.

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Adding to the experience are the free plastic buckets and spades for making sandcastles, portable goals for beach soccer, nets for volleyball and even giant touch-screen internet terminals on the boardwalk.

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