ticktack
/ˈtɪkˌtæk/a system of sign language, mainly using the hands, by which bookmakers transmit their odds to each other at racecourses (赛马场上赛马登记赌注者间传达投注赔率的)手势信号
noun [具体名词]（钟表）滴答声；（心脏）跳动声
Finally, a steady and high-efficient P2P file sharing software is designed and it's named Ticktack.
最终设计并实现出了一套稳定、高效的P2P文件交换系统Ticktack。
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