按梅菈的说法，虽然可用双氧水和苛性钠杀菌，但这会造成水质污染并对植物有害。
Hydrogen peroxide or caustic soda can also be used to kill bacteria, but it pollutes the water and harms plants, says ms Mehra.
如果我们经常进食受污染的食物，或进食含有太多脂肪，糖分及钠质的食物，我们易患上长期。
If we take in contaminated food regularly, or consumes food that contains excessive fat, sugar, or sodium, we are very likely to have long-term health problems.
铝工业废渣堆场对环境的危害主要表现在对地下水及地表水体的污染，其主要污染物为碱、氟化物、铝及钠等。
The harmfulness of aluminium industrial residue deposit on environment mainly lies in its pollution of underground water and surface water.
对冶炼中有害元素钾、钠、氟、硫的控制还缺乏有效手段，致使出现高炉利用系数偏低、高炉不畅和造成环境的严重污染。
Control on harmful elements such as K, Na, f, s in smelting is short of effective measures, which results in BF capacity factor low, BF process not smoothly and serious environment pollution.
对冶炼中有害元素钾、钠、氟、硫的控制还缺乏有效手段，致使出现高炉利用系数偏低、高炉不畅和造成环境的严重污染。
Control on harmful elements such as K, Na, f, s in smelting is short of effective measures, which results in BF capacity factor low, BF process not smoothly and serious environment pollution.
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