In the past, obtaining fresh water by distillation has always been too expensive.

过去这些年来，用蒸馏法制取淡水成本一直很高。

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Pratibha Singh, a lawyer for the Indian generic drug manufacturer Cipla, said the ruling had set a precedent that would prevent international pharmaceutical companies from obtaining fresh patents in India on updated versions of existing drugs.

BBC: Novartis: India rejects patent plea for cancer drug Glivec