寻欢
to seek pleasure (esp. sexual)
循环
to cycle; to circulate; circle; loop
寻欢作乐
pleasure seeking (idiom); life of dissipation
循环使用
recycle; to use in cyclic order
循环节
recurring section of a rational decimal
循环论证
circular argument; logical error consisting of begging the question; Latin: petitio principii
循环赛
round-robin tournament
密闭式循环再呼吸水肺系统
closed-circuit rebreather scuba (diving)