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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.本剧讲述主人公一家四个男人分别是9岁、19岁、29岁、39岁，由于家族历史有“逢九必衰”的惯例，母亲福子甚是担忧四处寻找化解灾祸的良方，由此引发了一连串的故事。且看主角们如何扭转“逢九必衰”的命运，迎来属于他们的美好人生。"I didn't react at first, and the" buzzing "sound they made at that time was too loud. Did I not say it just now? I could cover the gunshot. A comrade-in-arms around me spoke to me. I could only see his mouth moving, but I couldn't hear any word he said. My ears were full of the" buzzing "sound, which was very noisy." Zhang Xiaobo said.现在大敌当前，若是内部不稳定团结，当真让人忧愁。2. Set nodejs prefix and cache pathsA few years later, the traffic era began. Station B has also started to implement the big member system. Well, how do you say it? It is only natural to support the original version. However, some plots or pictures of some cartoons are harmonious, and there are actually no very special pictures. Sometimes it is very serious viewing experience. As Bai Piao Wang, I naturally can't stand it. Because there are many things to operate on the PC side, there is not much feeling. Mobile terminals such as phablet feel particularly deep. One is advertisement. I can say a few words with my eyes closed. Is the holiday boring? Why don't you learn PS? , test whether you can become an excellent original painter! After all, websites do not use love to generate electricity, and there is nothing wrong with planting advertisements. However, in the era of big data, there are always some annoying things. For example, I accidentally opened a video with vulgar content, and then all kinds of similar videos were recommended crazily. I turned over several pages of this kind of video, which is really disgusting ~玉米不知为何。