它不能净化水，但可以过滤掉可见沉淀物和可怕的小虫子。
Socks won't purify water, but filtering it through fabric can help remove the more visible sediment and creepy- crawlers.
首先，确定让水位上升的砖头或者马桶清洁装置没有挡到阀门，让它不能正确关闭；然后清除挡水阀座周围的矿质沉淀物，检查连在挡水阀的拉管是不是太短，有没有把挡水阀拉得有轻微缝隙。
This includes removing any mineral deposits around the seat beneath the valve. Also check that the pull chain attached to the valve is not too short and holding the valve slightly open.
动力学研究表明，在硝酸硫胺沉淀结晶过程中，初级成核是主要的成核方式，当晶浆密度较高且过饱和度很低时，二次成核不能忽视。
Primary nucleation was the main nucleation mode in the precipitation process. However, secondary nucleation cannot be ignored when the slurry density is high, and the supersaturation is low.
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