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Scientists warn that the debris is congesting space and threatens collision with rockets, the International Space Station, and our planet.
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He says the results could change predicted extinction dates for Emperor penguins.，这一点在爱思助手下载最新版本中也有详细论述
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In some cases, alternative gelling agents might provide faster results. Researchers observed that bacterial cellulose and another bacterial polysaccharide, Eladium, allow a 50 percent increased growth rate for various bacteria and yeasts (as compared to their growth on agar), including higher biomass yields or faster detectable biofilm formation. However, both substances are still not as cheap and readily available as agar.