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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.参见大王。3, Contact the context, understand the meaning of words.Total attack power 2437.71HBO诗选剧《真探 True Detective》第二季评价下挫后，事隔两年才获批准拍第三季，第三季由Nic Pizzolatto执笔﹑Jeremy Saulnier﹑Daniel Sackheim及Nic Pizzolatto负责执导，现定于美国时间19年1月13日首播。《真探》第三季讲述在Ozarks一个神秘﹑跨越数十年的犯罪故事，该季剧情会分成3个时间线。Mahershala Ali（凭《月光男孩 Moonlight》赢得奥斯卡最佳男配角）饰演主角Wayne Hays，阿肯色州西北区的州警探。其余主演包括Carmen Ejogo﹑Stephen Dorff﹑Ray Fisher﹑Michael Greyeyes﹑Jon Tenney﹑Deborah Ayorinde﹑Rhys Wakefield﹑Sarah Gadon﹑Emily Nelson﹑Brandon Flynn﹑Michael Graziadei﹑Josh Hopkins及Jodi Balfour。