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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.Netease's film recorded another real death in a calm and depressing way. Under the camera, these dead people died without relatives. They were either strangers, people living alone, or elderly people living alone. Their death had no sadness, no tears, no funeral, and was as calm as if they had never been here. Those with relatives will be brought back by their relatives, while those without will be cremated and placed in a small iron box. The department responsible for reporting the iron box cleans up the iron box every 5 years, pours the ashes in the box into a large pit and buries them together with the iron box. Smoke floated and they left the place where they used to live quietly.　　同年，香港邵氏电影公司根据黄鹰两部小说投拍电影《天蚕变》。天蚕变的热潮仍未减退。原来，生命也可以活得如此简单。看着不傻啊？高个军官又打量了一遍杨长帆，想了想不能太草率，于是非常认真地问道，你傻么？你才傻，你全家都傻。故事围绕着五位主角展开。单身的泰德（乔什·拉德诺 Josh Radnor 饰）还在寻寻觅觅自己的真命天女，经历了多次失败的感情之后，他发现自己不再如以前一样有信念了。意外重逢了6年前的女友维多利亚。他想和维多利亚复合，却被告知对方将要订婚 。