单词：pruen
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Rubber May Soon Come from Weed 橡胶或很快能从杂草提炼 People have been using products made with synthetic rubber for more than a century. But high-quality tires for cars, trucks and aircraft still must contain 40 percent or more natural ru
发表于:2019-01-12 / 阅读(51) / 评论(0)
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Rubber May Soon Come From Dandelions Synthetic rubber has been around for more than a century, but quality tires for cars, trucks and aircraft still need up to 40 percent or more natural rubber content. As the source of natural rubber, the rubber tre
发表于:2019-01-14 / 阅读(52) / 评论(0)
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