clockern.赛马预赛时计速员；计时员clockn.时钟v.计时；打卡clock-tower钟楼clock setting时钟设置clock doubler时钟倍频器Clock network时钟网络clock-reset时钟(脉冲)复位clock clapper钟锤clock tripled时钟三倍频clock impulse钟脉冲clock paradox时钟佯谬clock starter钟表起动器