Some people say step pricing can be used to protect a basic water allowance for drinking, cooking and washing.
有些人说阶梯式定价可用来保护用于饮用、做饭和洗濯的基本用水补贴。
Some say step pricing can be used to protect a basic water allowance for drinking, cooking and washing - either for very low prices or for free, as it is in South Africa.
有些人说无论原本水价是极其低廉还是免费，可以通过逐步涨价来为饮用，做饭和洗濯给予基本的用水补助保护，就像南非做的那样。
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