辉瑞公司上周宣布，已与罗氏和Alnylam一道，就这种形式的RNAi药物运输工具与加拿大生物技术Tekmira制药公司达成一笔交易。

Pfizer last week announced a deal with Canadian biotech Tekmira Pharmaceuticals Corp for this type of delivery vehicle for its RNAi drugs, joining Roche and Alnylam.

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因为这就意味着，一旦特许药的成本上升，制药公司就只能完全依赖与生物技术公司的合作关系了。

It would mean relying entirely on partnerships with biotech companies when the cost of licensing-in drugs is rising.

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