Some people say step pricing can be used to protect a basic waterallowance 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。
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Some say step pricing can be used to protect a basic waterallowance for drinking, cooking and washing - either for very low prices or for free, as it is in South Africa.