求翻译：其次，电能表计量正反有功电能，分为尖、峰、平、谷四种费率对电量进行计价，响应国家消峰平谷、平衡用电的政策，这就需要在单片机之外连接上一个实时时钟，进行准确计时。是什么意思？

Secondly, the power meter measurement of active energy, positive and negative, is divided into tip, peak, flat valley, four kinds of rates on electricity pricing in response to the National Consumer peak Pinggu, the balance of electricity policy, which requires outside in single-chip connection real

Secondly, both positive and negative Electricity Metering meritorious power tip, which is divided into, peak, and valley of 4 rates of electricity price, the peak response to the Changping, balancing the use of electricity policy, which requires a single machine connected to the outside of a real-ti

Next, the electrical energy instrument quantity pro and con actives the electrical energy, divides into the point, the peak, evenly, the valley four tariffs carries on to the electric quantity counts the price, the response country disappears the policy which peak Pinggu, the balance use electricity

Secondly, the positive and negative active energy meter measurement, is divided into four sharp, peaks, flat, Valley rate on electricity pricing, Pinggu respond to national extinction peak, balanced power policy, which will require connections other than the previous single-chip real-time clock, an

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