由此可见，十天干与太阳出没有关，而太阳的循环往复周期，对万物产生着直接的影响。
The heavenly stems are associated with the sun's revolution which affects lives on the earth.
这个周期一直循环往复。
整个周期开始自己的循环往复。
移动阴极：采用机械装置使被镀制件与极杠一起作周期性往复运动的阴极。
Mobile cathode: the mechanical device makes the plated with its poles together as a product of the periodic reciprocating motion cathode.
介绍了旋转环形水槽的结构和工作原理，提出了削弱环形水流离心力的方法，通过环形水槽中周期往复流泥沙运动试验得出水体含沙量与床面剪切力和水体挟沙力之间的关系。
The method of weakening centrifugal force in the rotary ring flume is proposed and sediment movement under the effect of periodic reciprocating current is tested in the ring flume.
后者(例如汽油往复活塞发动机)不连续的燃料和空间周期性点燃。
In the second (e. g., gasoline-reciprocating-piston engines), discrete quantities of fuel and air are periodically ignited.
本发明涉及一种用于轧机特别是周期式冷轧管机的驱动系统（1），包括：至少一个往复式机架（2）；
The invention relates to a drive system (1) for a milling system, in particular a cold pilger milling system, which has at least one reciprocal frame (2);
这种往复运动也叫摆动或周期性运动。可以有很多例子证实；
Such a repetitive motion is said to be oscillatory or periodic. Many other examples might be cited;
这种往复运动也叫摆动或周期性运动。可以有很多例子证实；
Such a repetitive motion is said to be oscillatory or periodic. Many other examples might be cited;
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