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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.讲述因为罹患过剩记忆症候群而把一年365天8760小时的全部都记忆下来的男人，以及忘却了人生的重要时间的女人，带着同样伤痛的两人命运般地邂逅后相爱的故事。《识骨寻踪》迎来了第六季。一边喝一边问：那依你说，咱们该咋办？记住，就当是金殿考策论，或者是你大哥考你兵法。之后，她接了一个个人们热议的案子，发生了一系列故事。本尼是一个娇弱的女孩，有着不受约束的精力。她是个“系统破坏者”。这个术语用来描述那些违反每一条规则的儿童；那些拒绝接受任何形式的结构的儿童，以及那些逐渐从德国儿童和福利服务的裂缝中跌落的儿童。不管这个9岁的孩子被带到哪里，她都会在短时间内再次被解雇。这正是她所追求的，因为她所想要的就是能够再次和她母亲生活在一起，一个完全无法应付女儿不可估量的行为的女人。