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Polylactic acid (PLA) is a new bio-based and renewable biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, then glucose and certain strains are fermented to produce high purity lactic acid, and polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generates carbon dioxide and water without polluting the environment, which is very beneficial to environmental protection and is recognized as an environment-friendly material. This thing is actually a long piece, and then "curled up" in it and wrapped in a cylinder shape. What's the use? You will see it in a short time.In addition, system administrator Trevor Pott posted a full and accurate blog post on The Register website (see for details). He admitted that he accidentally became an accomplice to DDoS attacks because "he made a simple configuration error while building a DNS server on the edge of his network. "He called it an" edge scrubber "that acts as a router, distributing IP addresses to servers and routers in the data center. It also represents all other devices on the network, "playing a variety of" boring and rough work "functions. It is a data center/local network time server, an external DNS server, an edge server, and a bandwidth limiter.明建文四年六月，神剑山庄的三少爷谢晓峰与外号“夺命十三剑”的燕十三在江边开始一场名誉之争的比试！而这天也正是谢晓峰和慕容秋荻结婚的大喜日子。比剑中途，谢晓峰被他的结义大哥铁铉之妻吕香华带走。谁也没有想到他这次要面对的是一个比生死还要严峻的考验…… 　　一来，像泥鳅、李敬文等人跟小葱从小一块长大，脾气性格都是熟悉的。