So far, specialists have worked to add preservative materials to the churches' exteriors.

到目前为止，专家们一直在为教堂外围添加防腐性材料。

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After testing different combinations, they chose two materials that worked: a silver-plated yarn that can light up and a kind of thread that conducts electricity.

在测试了不同的组合后，他们选择了两种有用的材料：一种可以发光的镀银纱和一种导电的线。

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Artists have worked in the genre for more than two millennia employing an exceptionally wide range of materials.

两千年来，画家们运用在这一流派中材料种类繁多。

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Nevertheless, they worked hard, finding whatever English materials they could.

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But the journal Advanced Materials reports that researchers have worked out how to increase their longevity.

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To this end, the Ministry of Education and the UNESCO-LINKS programme worked alongside Mayangna education professionals to develop materials.

UNESCO: Social and Human Sciences