Sometimes bowlers will get a little lazy with their push away. This will shorten the swing cycle and tend to make the bowler have early timing.
有时球员推球时有点无精打采，这样会缩短摆？圈，进而造成过早的时间差。
The up-swing of the leverage cycle makes sure of that.
杠杆周期中的上摆活动使其成为必然。
Swing should depend on wave. Avoid resonance arising from the cycle of vertical shake being near the cycle of wave because of adjusting speed.
因此改变航速应视波浪情况，力求避免调整航速而带来纵摇周期与波浪周期接近出现的“共振”现象。
The cycle frequency of jet fluid swing is half of that of tangential circle rotation.
相应切圆呈周期性旋转，射流摆动也具有周期性，该周期是切圆旋转周期的一半。
The cycle frequency of jet fluid swing is half of that of tangential circle rotation.
相应切圆呈周期性旋转，射流摆动也具有周期性，该周期是切圆旋转周期的一半。
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