But switch the source to a river or an aquifer, and the cost of a cubic meter of water can plummet to 10 to 20 cents, and farmers often pay far less.
如果从河流或地下取水，每立方米的成本可大幅降至10至20美分，农业用水的成本甚至更低。
But switch the source to a river or an aquifer, and the cost of a cubic meter of water can plummet to 10 to 20 cents, and farmers often pay far less.
如果从河流或地下取水，每立方米的成本可大幅降至10至20美分，农业用水的成本甚至更低。
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