licence fee

基本解释

His team at Stanford developed a Wi-Fi antenna for a client who did not want to pay a patent-licence fee to Cisco Systems.
他在斯坦福大学的研究小组为开发出了一种无线高保真（Wi-Fi）天线，而这位客户不愿向Cisco系统公司支付专利权许可费。
Unlike the BBC, which is financed by a licence fee paid by British viewers, the other networks, even state-owned Channel 4, had to live by selling advertising space.
BBC和其他电视网络商不同，前者经费由英国电视观众所支付的许可使用费提供；而后者，就算是国有的第四台，也必须靠出售广告位营生。
ecocn.org
The BBC World Service is currently funded by a grant from the Foreign Office, in contrast to the domestic BBC, which is funded by an annual licence fee payable by viewers in Britain.
英国广播公司现在的国际广播部门其资金来源于英国外交部的拨款，相比之下其国内产品则是来源于英国国内观众每年所交的电视年费。

And a licence fee to enter a market is most definitely a sunk cost.
FORBES: India's Mobile Phone Operators Insist It's Not a Competitive Market