不能生物降解的，难以生物降解的

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发表于:2018-12-16 / 阅读(130) / 评论(0)

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Matthew: Hey Kat, you were just telling me about all the pros and cons of different renewable energies and you just got me thinking we're going to run outof oil in the next couple of decades. There's reports that say we're going to run out of oil in

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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. The common method of closing a surgical incision is simply to stitch the patient up. There are some issues, though. Good stitching can be challenging,

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Asia's plastic industry is growing, with China and India challenging established producers such as Thailand. Now, there is increasing attention to the environmental impact of plastics. Both environmentalists and industry executives agree biodegradabl

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Todd: So, Steven you've been talking a lot about adventures you can do in your country. Do you have any stories of adventure that's happened to you in your own country of Costa Rica? Steven: Well, when I was in middle school, my school decided to tak

发表于:2019-01-25 / 阅读(146) / 评论(0)

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VOA标准英语2010年-Scientists Convert Feathers Into Biode

If you're a home gardener you may soon find that the pots you buy flowers and plants in are made from chicken feathers. Yes, tons of feathers that go to waste every year can now be transformed into plastics. Two Washington-area scientists are using f

发表于:2019-02-07 / 阅读(169) / 评论(0)

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英语时差8，16

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