The reasons why they don't, and why the environment has not been ruined, have to do with prices, technological innovation, social change and government regulation in response to popular pressure.
他们不这样做的原因，以及为什么环境没有被破坏的原因，都与价格、技术创新、社会变革和政府应对公众压力的监管有关。
The design starts with integration of technological interventions to emulate a treatment system, which then is taken over by nature to be managed with self regulation and low maintenance.
设计项目从整合技术、模拟处理系统开始，之后让自然接管该系统，实现自动调节和低维护。
Study show there are three kinds of technical barrier: technical standard, technological regulation and quality assessment.
通过研究，我们发现技术壁垒有三种表现形式，即：技术标准、技术法规和。
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