translation.en: In the first step in this process we pressurize the water and pass it through a reverse osmosis membrane: a thin, permeable plastic membrane that allows water molecules to pass through but traps and retains the salts, the viruses and the organic chemicals that might be present in the wastewater.
translation.zh: 第一步是给水加压， 让它通过反向渗透膜 ——一种很薄的、可渗透的塑料膜—— 水分子可以通过， 但废水中可能含有的盐、病毒和有机化学物 会被拦截下来。