Therefore the revise of patent law is of great urgent to solve the more and more complicate controversy over patent infringement in judicial practice.

因此，为解决司法实践中越来越复杂的专利侵权纠纷，专利法的修订已刻不容缓。

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Controversy exists over the operation for closure of complicated patent ductus arteriosus (PDA) under cardiopulmonary bypass (CPB) with deep hypothermia and low perfusion flow.

关于重症复杂型动脉导管未闭(PDA)是否应在深低温低流量体外循环下行闭合手术，尚有争议。

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In the case of patent litigation, the source of controversy is a patent.

FORBES: Why Drug Patent Settlements Are Good For Consumers

With all the controversy, will patent reform happen this year?

FORBES: Patent Fight Pending

The trial goes to the heart of the escalating controversy over how much patent protection pricey brand-name drugs should get.

FORBES: Hard to Swallow