As the cycle is the reciprocal of frequency, each time half a second interruption.
由于周期是频率的倒数，因此每半秒中断一次。
After improving, the frequency of feeding interruption decreased from 12/month to< 2/month.
改进后断流次数由每月12次减少为2次以下。
After improving, the frequency of feeding interruption decreased from 12/month to< 2/month.
改进后断流次数由每月12次减少为2次以下。
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