And I was researching on water purification system, which has a low impact on environment.

我在研究对环境影响小的水净化系统。

My invention is a large scale air purification system for developing countries like India and China.

我的发明是针对印度和中国等发展中国家的大型空气净化系统。

These are the first of several planned amphibious structures, some of which house water purification systems and solar collectors.

这些是早期规划中的水陆两用建筑，其中一些安装了净水系统和太阳能收集器。

Tepco said for years that its purification system would reduce 62 radionuclides to safe or non-detectable levels and that only traces of tritium, a radioactive form of hydrogen, and two other isotopes would remain.

多年来，Tepco声称其净化系统将把62种放射性核素降低到安全或不可检测的水平，只会残留微量的氚（一种放射性氢同位素）和其他两种同位素。

Graphite One is working with Sunrise New Energy, a Chinese anode-materials company in Zibo, Shandong province, on a purification system that would gently heat the graphite in the presence of recyclable cleaning gases.

Graphite One 正在与位于山东省淄博市的中国阳极材料公司 Sunrise New Energy 合作开发一种净化系统，该系统可以在存在可回收清洁气体的情况下温和加热石墨。