The bacteria can renew their own enzymes, so such a system should last indefinitely.
细菌可以重新激活他们自身的酶，因此这样的系统能够永久的持续下去。
Is the filtration system adequate? What's the clean frequency and renew frequency?
过滤系统是否完善？清洁频率与更换频率是多少？
The goal of treatment is to lower HIV levels to help the immune system renew itself and keep people healthier longer, in part to stem the spread of the virus.
治疗目标是降低艾滋病毒水平，以帮助免疫系统的自我更新，并保持人民较长的健康，部分原因也是为了阻止病毒扩散。
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