translation.en: So we need materials in closed cycles, but we need to analyze them down to the parts per million for cancer, birth defects, mutagenic effects, disruption of our immune systems, biodegradation, persistence, heavy metal content, knowledge of how we're making them and their production and so on.
translation.zh: 因此我们需要将材料放入封闭循环系统， 但我们要微量分析这些材料有否 癌症、生育缺陷、突变、 免疫系统破换、生物可分解性、耐用性、 重金属含量、还有我们如何制造它们 和生产它们的知识等等。