One option is to use existing chemicals, but at greater dilutions.
一个选择是利用现存的化学物质，但是要大量的稀释。
As a big country in producing and using chemicals, there are thousands of chemicals being marketed in our country, but the environmental management of existing chemicals still falls behind.
作为化学品生产和使用的大国，我国市场上流通的化学品数以万计，但是针对现有化学品的环境管理尚处于落后阶段。
There is no cure and existing drugs, which raise levels of key brain chemicals, do not work for everyone and their effects wear off over time.
没有药物能治愈它，也没有药物对此有长期疗效。 那些提升大脑关键化学成分的药物不是对每个人都适用，而且它们的药效也会随着时间流逝而减弱。
The chemicals are still getting into the environment from existing products, ” she said.
因为这些化学物质还是一直从现有的那些产品中进入到周围的环境中。
Currently, more and more studies have reported that a few adverse health effects on human have been attributed to some chemicals existing in environment.
近年来越来越多的研究表明，人类和野生动物的不良健康效应可能与环境中的某些化学物质有关。
The company mainly produces chemicals and pesticides business of biotechnology products, the existing series of 20 original three-over 70 pesticide products.
公司主要生产经营农药化学品和生物技术产品，现有三大系列20个原药70多个农药产品。
And there are existing methods, like a machine that can quickly identify chemicals in pills to confirm if the pills are real.
还有一些现存的方法，例如，一种机器可以迅速分析药品中的化学成分，以确认其真实性。
The Catalogue was prepared with toxicity indexes of the chemicals as the judging boundary. It does not change the existing classification of hazardous chemicals.
本目录是以化学品毒性指标作为判定界限而收录，不改变现行有关危险化学品的分类。
The Catalogue was prepared with toxicity indexes of the chemicals as the judging boundary. It does not change the existing classification of hazardous chemicals.
本目录是以化学品毒性指标作为判定界限而收录，不改变现行有关危险化学品的分类。
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